Kristen

1. name and define in detail the four organic compound groups that make up the chemistry of living things. Lipids, carbohydrates, proteins, and nucleic acids. See Part IV of http://www.ucmp.berkeley.edu/people/brs/biol1a/Lect2.html for specifics

20 years ago

cells are the basic unit of life based on the original cell theory. name and define the function of at least nine organelles of animal cells. You will find a list of 14 cell organelles and their functions (what they do) at: http://library.thinkquest.org/1...

20 years ago

Critical to life is the function of the cell membrane and its ability to move materials across the cell membrane. Define each of the following in detail using diagrams to aid the understanding of the process. a) diffusion b) osmosis c) facilitated diffusi...

20 years ago

living organisms require energy to function and this includes each and every one of the trillions of cells that constitute the human body. Define in detail and use diagrams appropriate to show how cells extract, use and store energy including but to limit...

20 years ago

I have to write a commentary on the play the glass menagerie where i have to analyze the author's style and my impression on the author. I've never written anything like this before. HELP PLZ!! I had this exact assignment when I was in High School in 1959...

19 years ago

Meat tenderizers contain enzymes. How do these enzymes affect protein in meat? The enzymes break the tendons and muscle to make them more chewable. As I understand it, however, the protein content that is usable in the body is unchanged. The enzyme simply...

18 years ago

Why don't nerve and muscle cells undergo mitosis? Go to the link and scroll way down to G2 Phase for a short answer: http://www.dartmouth.edu/~cbbc/courses/bio4/bio4-1997/02-theCell.html

18 years ago

Some conifers bear female cones on the top half of the tree and male cones on the bottom half. Why do you think this arrangement of male and female cones on trees is important?

18 years ago

A hoodlum throws a stone vetically downward with an initial speed of 12.2 m/s from the roof of a building, 28 m about the ground. How long does it take the stone to reach the ground? What is the speed of the stone at impact?

18 years ago

To stop a car, you require first a certain reaction time to begin braking. Then the car slows under the constant braking deceleration. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 82.5 km/h,...

18 years ago

A startled armadillo leaps upward rising .536 m in the first .197 s. What is its initial speed as it leaves the ground? What is its speed at the height of .536m? How much higher does it go?

18 years ago

A ball of moist clay falls to the ground from a height of 12 m. It is in contact with the ground for 20.5 ms before coming to rest. What is the average acceleration of the clay during the time it is in contaact with the ground?

18 years ago

A basketball player, standing near the basket to grab a rebound, jumps 62 cm vertically. How much time does the player spend in the top 15 cm of this jump? How much total time does this player spend in the bottom 15 mc of this jump?

18 years ago

A hot air balloon is ascending at the rate of 13 m/s and is 75 m above the ground when a package is dropped over the side. How long does the package take to reach the ground? With what speed does it hit the ground?

18 years ago

A drowsy cat spots a flowerpot that saild first up and then down past an open window. The pot was in view for a total of .43 s, and then top-to-bottom height of the window is 2m. How high above the window top did the flowerpot go?

18 years ago

I would just like to sat thanks to drwls for helping me a bunch with the physics questions...AP physics is pretty hard..thanks again, whoever you are.. I am sure i will be back plenty of times!

18 years ago

Set Q is defined as odd integers from 1 to 2000. How many ordered pairs (a,b) are there in set Q whereby a<b?

18 years ago

The mean of five whole numbers is 12. If you take away the smallest number, the mean is 16. What is the smallest number?

18 years ago

A ball is shot from the ground into the air. At a height of 0.1m, the velocity is observed to be v=7.7i + 6.4j in meters per second (i horizontal, j upward). What is the direction of the ball's velociry just before it hits the ground?

18 years ago

The relatioship of structure to funtion is one of the major themes in biology. Describe the structure of enzymes and then expliain how the function (catalysis) is related to structure. Aslo discuss some factors that may affect the activity of the enzyme a...

18 years ago

The fast train known as the TGV that runs south from Paris, France, has a scheduled average speed of 216 km/h. If the train goes around a curve at teha speed and the acceleration experienced by the passengers is to be limited to .07g, what is the smallest...

18 years ago

how do i find angular acceleration?

18 years ago

What is the probability of rolling a six with a standard die, six times in a row?

18 years ago

An elevator and its load have a combined mass of 1550 kg. Find the tension in the supporting cable in Newtons when the elevator , originally moving downward at 11 m/s, is brought to rest with constant acceleration in a distance of 43 m.

18 years ago

An airplane in a horizontal circle at a speed of 130.5556 m/s. If its wings are tilted 40 degress to the horizontal, what is the radius of the circle in which the plane is flying? Assume that the required force is provided entirely by an "aerodynamic lift...

17 years ago

What is the answer to this analogy? join:club::enroll:?

17 years ago

Which of the following statements about NAD+ is false? A). NAD+ is reduced to NADH during both glycolysis and Krebs cycle B). NAD+ had more chemical energy then NADH C). NAD+is reduced by the action of dehydrogenases D). NAD+ can receive electrons for use...

17 years ago

A .35 kg ladle sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (with the spring constant (k) =455 N/m) whose other end is fixed. The mass has a kinetic energy of 10 J as it passes through its equilibrium position...

17 years ago

A 1.7 kg bundle starts up a 30 degree inlcine with 105 J of Kinetic Eneergy, How far will it slide up in the plane if the coefficient of friction is .3 ?

17 years ago

A paratrooper fell 380m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 58 m/s(terminal speed), that his mass (including gear) was 90 kg, and that the f...

17 years ago

a cue stick strikes a stationary pool ball, exerting an average forece of 50 N over a time of 7 milliseconds. If the ball has mass .1kg, what speed does it have just after impact?

17 years ago

Which molecule contains ribose has its sugar? where in the cell does DNA become RNA?

17 years ago

do you guys have an someone that good with advanced physics, because i have a few problems that i am not sure how to do and its for my AP physics class, and I wasn't sure if you had someone on board now that could help thanks

17 years ago

On Block has a mass M=500 g, the other has mass m=460 g, they are hooked to a string and is on a pulley will one mass on either side, the pulley, which is mounted in horizontal frictionless bearings, has a radius of 5 cm. When released from rest, the heav...

17 years ago

starting from rest, a disk rotates about its central axis with constant angular acceleration. In 4 seconds, it has rotated 50 rad. What was the angualr acceleration during this time? What is the instantaneous angular velocity of the disk at the end of the...

17 years ago

A record turntable is rotating at 33 and 1/3 rev/min. A watermelon seed is on the turntable 7.5 from the axis of rotation Calculate the acceleration of the seed assuming that it does not slip? Suppose that the turntable achieves its angular speed by start...

17 years ago

A uniform spherical shell of mass M and radius R rotates about a vertical axiss on frictionless bearings. A massless cord passes around the equator of the shell, over a pulley of rotational inertia I and radius r, and is attached to a small object mass m....

17 years ago

Eliminate the parameter and write the corresponding rectangular equation. X=2cos theta, y=4sin theta

17 years ago

what are the slopes of the asymptotes of the hyperbola: (x^2)/9 - (y^2)/4 = 1

17 years ago

It has been since the beginning of last year since I last did this math and the teacher I currently have is a sub and doesn't know what the heck she's doing either - so if anyone can help me, that'd be oh so amazing! a. Solve d=rt in terms of d and t. b....

17 years ago

Find the limit of (10^x - 5^x)/x as x approaches 0

16 years ago

use the rule that says limit of (e^h - 1)/h = 1 as h approaches 0 to show that the limit of [ln(x+h)-lnx]/h as h approaches 0 = 1/x, where x>0

16 years ago

If f(x) and g(x) are continuous functions with f(6)= 3 and limit as x approaches 0 of (5f(x) - g(x)) = 4, what is g(6)?

16 years ago

The top and bottom of a can must be made of copper that costs two cents per square inch and the curved side is to be made of aluminum that costs one cent per square inch. Find the radius and height of the can that will maximize the volume of the can where...

16 years ago

How do i add two negative fractions?

16 years ago

ok the problem is -1/14+(-3/7)

16 years ago

The limestone blocks from which an ancient pyramid was made weigh about 2 tons per cubic yard. Find the approximate weight of the pyramid having a square base of length 250 yards and a height of 150 yards.

16 years ago

A grain storage tank is in the shape of a cylinder covered by half a sphere. The height of the cylinder is 50 feet and its diameter is 80 feet. find the total surface area (including the base) and volume of the tank.

16 years ago

K I have to write a report on housing insulation. I'm trying to find out when people first starting using it. Any ideas?

16 years ago

Hi there, could you help me create a thematic statment for the following essay question Discuss the contribution to Scout's maturation by three of the following characters: Calpurnia, Mrs.Dubose, Mr.Cunninghan, Miss Caroline and Mayella Ewell. Why are the...

16 years ago

Which type of angle has the GREATEST number of degrees?

16 years ago

How do I write an IF formula for the following statement? **July’s budgeted expenses are based on the differences between the budgeted and actual expenses for June stored in column D. July’s budgeted expenses will be the same as those for June when the di...

15 years ago

Find a function f(x) = a + b sqrt(x) that is tangent to the line 2y - 3x = 5 at the point (1,4) AND Find a function of the form f(x)=c+dcoskx that is tangent to the line y=1 at the point (0,1) and tangent to the line y=x+(3/2) - (pi/4) at the point ([pi/4...

15 years ago

A rectangle has an area given by A=x^2+7x+2. Find expressions for the possible length and width of the rectangle.

15 years ago

How do I calculate 25.00mL of 5.0*10^-4 M of FeSCN^2+ using 0.002 M Fe(NO3)3, 0.002 M KSCN, 0.1 M of HNO3 and water?

15 years ago

How do you solve using the elimination method 0.3x-0.2y=4 0.5x+0.3y=-7/17

15 years ago

0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination method

15 years ago

solve using the elimination method 0.05x+0.25y=11 0.15x+0.05y=12

15 years ago

The sides of a triangle have the equations y=-1/2x+1, y=2x-4, and y=-3x-9. Verify that the triangle is an isosceles right triangle. Algebraic solutions only!

15 years ago

Using ƒ´Hfo and So values, calculate the standard molar free energy of formation for each of the following: a. CuSO4(s) b. ZnSO4(s

15 years ago

2. Methanol, CH3OH, is used as fuel in race cars. This liquid fuel can be synthesized using the following process C(s)+ ½ O2(g) + 2H2(g)  CH3OH(l) Calculate delta G using the deta Gf of the reaction. Calculate Kp. What is the relation between the magnitu...

15 years ago

How do figure out if a porabala is streched or compressed?

15 years ago

The area if a rectrangular swimming pool can be represented by the trinomial expression 6xsqaured+5x-4. If x= 4m, what is the total area of the pool and what are it's dimensions?

15 years ago

When magnesium is heated in air, it reacts with oxygen to form magnesium oxide. 2Mg + O2 --> 2MgO If the mass of the magnesium increases by 0.335 g, how many grams of magnesium reacted? A. 0.882 B. 0.441 C. 0.509 D. 1.02 E. Not enough Info

15 years ago

find the pH of each of the following solutions of mixtures of acids: .125M in HBr and .130 M in HCHO2, .155M in HNO2 and 9.0*10^-2M in HNO3, 5.5×10−2 in acetic acid and 5.5×10−2 in hydrocyanic acid

15 years ago

How do I find the area in square yards, using the distributive property, of a rectangular lot - no numbers given. I'm calling the length c and the width d.

15 years ago

A car travels due east with a speed of 60.0 km/h. Rain is falling vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 45.0° with the vertical. Find the velocity of the rain with respect to the car a...

14 years ago

Suppose that you are planning a backpacking trip and will need to boil 40 L of water for your group. What volume of fuel should you bring? Assume each of the following: the fuel has an average formula of C7H16; 15% of the heat generated from combustion go...

14 years ago

A load of 54 N attached to a spring hanging vertically stretches the spring 4.9 cm. The spring is now placed horizontally on a table and stretched 14 cm. What force is required to stretch it by this amount?

14 years ago

An architect makes a scale drawing. She uses 2 cm to represent 100 m. What is the scale ratio for her drawing? Show your work.

14 years ago

In ( ) are my verb tense. Would you please tell me if they are correct? I need (Present Tense) to participate in a financial program to help me with successful financial planning. In my online college course we did learn( Past Progressive Tense) about suc...

14 years ago

A motorcycle, initially traveling at a speed of 14 m/s, slows down (decelerates) at a rate of -3.5 m/s2 for 2 s. How far does it travel during that time?

14 years ago

A Corvette, initially traveling at a speed of 6 m/s, speeds up (accelerates) at a rate of 0.2 m/s2 for 3 s. How far does it travel during that time? I tried d=vi*t-.2*t^2 but I did not get the correct answer

14 years ago

how do you put the polar equation r^2(sin2u)=6 into rectangular form?

14 years ago

Describe, in detail, how to make 5.5 liters of a 2.5 molar HCl solution from a 10.5 molar HCl stock solution.

14 years ago

A Vogon’s grandmother, whose mass is 89 kg, drifts through empty space with a velocity of –6.20 m/s until she encounters the 460-kg Ravenous Bugblatter Beast of Traal, drifting with a velocity of +2.80 m/s. When they meet, the RBBoT immediately eats her....

14 years ago

A 1440-kg crate of cabbages is laid on a level, frictionless track at the end of a heavy spring. The spring is compressed a distance of 0.100 m by a force of 83500 N. When the spring is released, it propels the crate. the spring constant of the spring equ...

14 years ago

I still don't get how to get the time it takes to get from 82.5 to 50.3 km/h, i know its a constant deceleration, but i don't know how to get the time

18 years ago

I still don't get how to get the time it takes to get from 82.5 to 50.3 km/h, i know its a constant deceleration, but i don't know how to get the time it takes to decelerate

18 years ago

I still don't get how to get the time it takes to decelerate from 82.5 to 50.3 km/h, i know its a constant deceleration, but i know how to find either the deceleration or the time

18 years ago

find the slope using the distance and put the points into the point-slope equation y1 - y= m times (x-x1) so if you have the points (3,4) and the slope is 5 then the equation would look like this: 4-y= 5 (x-3) then distrubute the 5 so its 4-y = 5x -15 the...

18 years ago

a square will always give you the most area , so a 5 by 5 pool

18 years ago

yes and yes

18 years ago

just because the increase of price, the actualy supply will increase, but the movement along the supply curve to a higher quantity supplied would be correct

18 years ago

you look at the graph and divide your d value by the t value to find the walking rate, if it increase by one the then rate goes down bc you know are walking a second longer to go the same distance, or the slope of the line on the graph would be more steep...

18 years ago

thank you SOOOO much, i spent a long time trying to figure this out

18 years ago

chech wikipedia for social host liability

18 years ago

408000

18 years ago

i would say a line or two..then incorporate a quote, you just just use these " ", you can italize it if you want to but you don't have to blah blah blah blah. "This is the Quote" Kristen Showmaker. blah blah blah

18 years ago

1.64 inches equal .13666666 feet

18 years ago

I love you drwls!

18 years ago

59531.99999 ft cubed is equal to 1685759 liters

18 years ago

no...bc there is no depth with in an acre, only area, there is no volume, onceyou had the rain, an inch everyhwere, you now have depth

18 years ago

7418268 ft^2 x .225 ft of rain = 1669110 ft^3 = 47263930 Liters

18 years ago

tea taxes?

18 years ago

same, bc they don't get greater, and they usually drop in the same place

18 years ago

you shouldnt have waited this long then to actually d oit

18 years ago

look it up at google ..type in how many mega meters are in a decimeter

18 years ago

Thanks for responding, it really helped.

18 years ago

We need to be able to find an angle that it is at when it hits the ground

18 years ago

take 35 minus 8 for the adult that's going 35-8=27 she has 27 dollars to spend on children it costs 5.50 for one child to go, so you take 27/5.50 you get 4.9 only four full children can go because you don't have enough money for a fifth one

18 years ago

draw a tangent line and find the slope of that line, the derivative is equal to the slope of a tangent line at the point

18 years ago

there was a type-o..but you probably saw it...both questions are suppose to say..at what rate...not raite or riate

17 years ago

ok..that helps..thanks

17 years ago

the firecracker: there is soo many chemicals combined... Chemical The H-bomb: Thermal and nuclear energy they maybe confusing because they change through out activation

17 years ago

all embryos at some point look exactly the same no matter what mammal it is, for each animal though its at a different time period bc different animals take different amounts of times to grow as an embryo, but every one at some point will look identical

17 years ago

ok thanks

17 years ago

also, assuming that the acceleration does not change, through what additional angle will the disk turn during the next 7 seconds?

17 years ago

I get 4.77 N for T2..do i have a decimal wrong?

17 years ago

thank you very much i really do appreciate it

17 years ago

hey what school do you go to???

17 years ago

the name of the product is 4 methyl 2 pentyne. a propylide ion is a three carbon structure with a triple bond between the second and third carbons and a negative charge on the last carbon. the first carbon is bonded to three hydrogens. CH3CC-

17 years ago

Im a freshman just starting geometry...how am i supposed to know this stuff! You guys are lots and lots of help!

17 years ago

They are all correct. A is correct because the mean is the sum of all the numbers (638) divided by the quantity of numbers (12) B is correct because if you arrange the numbers in order from lowest value to greatest value, the 2 middle numbers are 53 and 5...

16 years ago

1 true 2 caused by a fungi

16 years ago

no

16 years ago

you have 29 total pounds. You want soo many pounds of the 44 cent and so many pounds of the 55 cent feed. So you can make the equation .44x + .55(29-x) = 29 x .47 Solve for x, that will tell you how many pounds of the cheaper kind they should use

16 years ago

3 gallons/$5.37 = 8 gallons/$14.32 Is correct!!!

16 years ago

huh?ok the problem is -1/14+(-3/7)

16 years ago

-7+ (-3) -7-3 -->always use the negative(not +) -10

16 years ago

kjc

16 years ago

a) Find the volume of the first cylinder using V=pi(h)(r)^2 and then multiply that by .75. This is the volume of the juice. Then, you divide that amount by the volume of the second container. b) Divide the amount of the juice by .27 to get the volume of t...

15 years ago

You have me so confused!

15 years ago

Thank you this is what I was looking for just something to refer too!

15 years ago

how do i solve the one with the fraction? do i multiply everything by two? or put every thing over two?

15 years ago

Oh Thank you, But them what are the dimensions? How do i figure out that?

15 years ago

Thanks I got it now

15 years ago

Reject it.

15 years ago

I'm stuck and am hoping you can help. Here is the problem: Aqueous solutions of calcium chloride and sodium phosphate react to form solid calcium phosphate and aqueous sodium chloride. How many moles of sodium phosphate are required to react completely wi...

14 years ago

the father is strtessed out and very tired

14 years ago

I need to know how many grams of each there are.

14 years ago

Colonies in north america from what i am reading. its an online class and i am having a hard time understanding my readings. Its US history

14 years ago

The Order of Operations rules in mathematics were not invented by one single person. They have been developed over the last few centuries.

13 years ago

Fair Game is a game in which each player is not more likely to win than another. In other words, in a fair game each player is equally likely to win the game.

13 years ago

I got A) Exo B) Exo C) Endo D) Endo But its wrong :/ i have no idea what i am doing wrong. A) 942+3(432)-6(386)=-78 B)494-522=-28 C)4(459)-2(432)+494=478 D)2(155)-155=155

13 years ago

The complex you get is the copper (II) hexaquo complex. Cu(NO3)2+6H2O⟶Cu(H2O)^+2(6) +2NO3^-

13 years ago

Okay, so would I solve it like: v^2=.8/.200 ?

13 years ago

A Bag contains 3 blue marbles, 2 red marbles, and 4 green marbles. Mark reaches in and randomly selects a marble. He replaces it, and randomly selects another. What is the probability that both marbles were the same color? What is the probability that 1 w...

13 years ago

C. d = the number of dimes, while 8-d equals the numbers of nickels, if you multiply the number of each coins by their value ( 10 cents or 5 cents ) and add them, you should get 60

13 years ago

never mind I finally got it after looking at it for almost and hour.

13 years ago

To find part B, plug in the known information into the equation: Vf=Vi+at and solve for Vf, the final velocity is the speed upon which the diver hits the water, since it's at the bottom.

13 years ago

I'm not sure how to post a picture with it but some more additional information that I did not add. The two poles and cable make a right triangle where CA is the shortest side at 3.80m, CD (the cable), and AD as the hypotenuse. CDA is an angle of 37 degre...

12 years ago

And how exactly are you supposed to show a picture? This website does not allow website links in questions that you can ask and you cannot upload a picture to show.

12 years ago

Yes it was a typo it was a 3! Thanks for the help this does make scense.

12 years ago

NM it is D not a real number

12 years ago

1 Foot High :)

12 years ago

I also had x=0 but I'm confused if its a identity, contradiction, or conditional equation

12 years ago

Thank you so much this makes the examples provided make much more scense the way you broke them down! Thanks!

12 years ago

Thank you. I made a 70% on this test, so I know at least 3 are wrong. On #1, I was torn between B and C. I'm reconsidering #3 to choice A. #5 I feel is the best choice. Lastly, #16 might be A.

12 years ago

What latitude experiences the smallest variation in insolation during the year? What explains this pattern?

12 years ago

$29 29x2=58 58-30=28 28x3=84 84-54=30 30x4=120 120-72=48

12 years ago

whoops sorry this is chemistry

12 years ago

thanks but i received this after the exam

12 years ago

can u do a more simpler way...we never learnt log yet..

12 years ago

I already tried sparknotes and everyother website I thought of miss...:(unfortunately

12 years ago

Ok so I have to do a comparative essay on a book and a film (I chose The Hobbit) .This is a comparison essay exploring to what degree an inherent film is discussed and how it relates to an aspect of the human condition. So my theme is revenge and the argu...

12 years ago

Oh ok thankyou so much:) I greatly appreciate it!

12 years ago

Yes, I know how to write a thesis statement and how a comparison essay goes.. But I already have my info: This is a comparison essay exploring to what degree an inherent film is discussed and how it relates to an aspect of the HUMAN CONDITION. So my theme...

12 years ago

Yes, I know how to write a thesis statement and how a comparison essay goes.. But I already have my info: This is a comparison essay exploring to what degree an inherent film is discussed and how it relates to an aspect of the HUMAN CONDITION. So my theme...

12 years ago

Sue*

12 years ago

But I realized that revenge wouldnt work..after her questions that's y

12 years ago

go on sparknotes...u will find out...this is about the hobbit...did u read the book or watch the movie...if u have a better idea please let me know. Thanks

12 years ago

We thank you Ms. Sue for your response. Unfortunately, this appears to be an equation that my daughter, 4th grade level, (nor I for that matter) are able to decifer to even understand how to answer the problem. Is it possible for you to verbally explain h...

12 years ago

Actually, from 8 a.m. to 3 p.m. is 7 hours. So it would be 14 generations in those 7 hours. That makes the answer 1,638,400. By 5 p.m. that would be 18 generations.

12 years ago

Nevermind; I think I've got it

11 years ago

Also, how do I find the maximum height?

11 years ago

Chose and drank?

11 years ago

A vending machine is designed to dispense a mean of 7.6 oz. of coffee into an 8-oz cup. If the standard deviation of the amount of coffee dispensed is 0.4 oz. and the amount is normally distributed, find the percent of times that the machine will: a.) Dis...

11 years ago

Nope.....I checked and it isn't a typo.

11 years ago

Please help Steve! This is due tomorrow and I have no idea how to figure this out!!!

11 years ago

It could be B.. Im not sure

10 years ago

(35/100)25 = 8.75 pounds of trim loss, then (80/100)8.75 = 7 pounds of cooking loss, so total loss is 15.75 pounds of meat. So total amount the chef has left to serve is 25-15.75 = 9.25 pounds

10 years ago

Reiny, thanks! I understand the difference between 5f and 5=f now - makes more sense! I forgot something from my original problem, though...it also says the bank teller has a total of 70 bills. Now what?!

10 years ago

If f = 21, the value has to be $105 and if there are 70 bills and 21 are 5's that means 49 are 10's which is $490. $490 + $105 = $595! 😄 Thanks...this kind of stuff is hard for me.

10 years ago

C. Relative Pronouns

10 years ago

(4.26-6.96)/(1000*9.8)=volume

9 years ago

A. wavelength= 343/ frequency of siren frequency= 343/ wavelength B. Frequency= 343* frequency of siren/ (343-velocity of ambulance) wavelength= 343/ frequency you found above C. Frequency= (343+velocity of your car)*frequency of siren / (343- velocity of...

9 years ago