Ethan

This page lists questions and answers that were posted by visitors named Ethan.

Questions

The following questions were asked by visitors named Ethan.

f(x) = x + 7 if x < or equal to 5 F(x) = 7 if x >5 what is the limit as x is approaching 5 from the left side????? I know that the limit as x approaches to 2 does not exist and that the limit as x is approaching 5 from the right side is 7

What is the limit as x approaches -1 of x - 5 --------------------- 4x(squared)-6x+ 3

x(squared)+8x+17 if x < or = -4 Let f(x)= 2 if x= -4 -x(squared)-8x-15 if x > -4 Show that f(x) has a removable discontinuity at x=–4 and determine what value for f(–4) would make f(x) continuous at x=–4. Must redefine f(–4)=____

Where does clay come from?

how do i find the inverse of f(x)= (3x+7)/(x-2)

Sodium phosphate, Na3PO4, reacts with HCl to form H3PO4 and NaCl. How many liters of 0.1 M HCl are required to react with 0.1 mole of sodium phosphate?

you buy a bottle of juice for $1.00. The juice costs 90 cents more than the empty bottle. How much does the empty bottle cost? The answer is not 10 cents.

Which of the following would be the limiting reagent in the reaction shown below? There are 50 molecules of O2 and 50 molecules of H2. 2H2(g) + O2(g) ==> 2H2O(g)

I have no idea how to do this activity..can someone please help!? In this activity you will investigate how chemical reactions are limited by the amount of reactants present. You will be using paper clips to represent atoms. You can describe the quantitie...

How would I find three different quotients that equal 5 to the negative 7th

Where is the adverb located in the following sentence? "Timothy was not so sure that he liked Ethan as much now that he was being mean to everyone."

y+2x=3, y+2x=-4

Homework Help!!! (Books)? I have a homework assignment and I really need help. I'll be very thankful and pleased if anyone can help. Compare the Adventures of Huckleberry Finn to The Glass Castle mainly the characters and the challenges they face through...

What would a good essay title be if I'm writing an essay about a character in a book who is torn between two conflicting forces?

A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed. If 100.0 mL of 1.5 M sodium phosphate solution is the limiting reactant, how many grams of calcium phosphate can be expected?

When an object is thrown into the air, relate it's mechanical energy to kinetic and gravitational energy.

Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century. In 72 centuries, what is the total (in hours) of the daily increases in time (tha...

During a hard sneeze, your eyes might shut for 0.58 s. If you are driving a car at 92 km/h during such a sneeze, how far does the car move during that time?

A car travels up a hill at a constant speed of 33 km/h and returns down the hill at a constant speed of 60 km/h. Calculate the average speed (in km/h) for the round trip.

(a) If the position of a particle is given by x = 16t - 7t3, where t is in seconds and x is in meters, when is the particle's velocity zero? (b) When is its acceleration a zero?

If a ball is thrown in the air with a velocity 44 ft/s, its height in feet t seconds later is given by y = 44t - 16t2. (Round your answers to one decimal place.) (a) Find the average velocity for the time period beginning when t = 2 and lasting 0.5 second...

I have to write an outline on The Sun Also Rises by Ernest Hemingway, and I can't seem to find an appropriate thesis statement for such a paper. I was hoping someone could help me. I was thinking something along the lines of: In The Sun Also Rises, Heming...

take the first definition then double one letter to spell a word Example Slang word for a police officer - cop A place wher chickens are kept - coop Q. Your male boy - before long - Q. A written sales pitch - To put two and two together Q. longing for som...

If B is added to C = 6.5i + 4.6j, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of C. What is the magnitude of B?

If a - b = 2.4c, a + b = 5.8c, and c = 1.3i + 4.9j, then what are (a) the x component of a, (b) the y component of a, (c) the x component of b, and (d) the y component of b? a, b, and c are vectors

Only two horizontal forces act on a 9.1 kg body. One force is 5.3 N, acting due east, and the other is 1.6 N, acting 56° north of west. What is the magnitude of the body's acceleration?

What is the length of the midsegment of the trapezoid made by the vertices A(0, 5), B(3, 3), C(5, -2) and D(-1, 2). Show equations and all work that leads to your answer.

I am a number between 20 and 30.When you put me into 6 equal groups,there is an even number in each group and 1 left over. i cant figure out how to solve this

A chain is held on a frictionless table with 1/3 of its length hanging over the edge. If the chain has length L = 33 cm and mass m = 21 g, how much work is required to pull the hanging part back onto the table?

Use the product rule to find the derivative of (2x^2 + 3)(3x + 5).

lim sin2x x->0 ----- x How do I get rid of the x on the bottom in order to solve this problem? Thanks!

insert grouping symbols into 2x3^3+4 to get it to equal 4374 and 279,936.

350.ml of .25M KOH is reacted with 250.ml of .30M H3PO4. Determine which is the limiting reagent, the molarity of the salt formed, and the final molarity of the reactant that was in excess.

the measure of an angle is 7 less than 10 times its supplement

given the graph of f(x) = x sinx, 0<=x<=2pi assuming that a quantity y changes at a rate of y' = xsinx, find by how much it will increase or decrease over 3pi/2 <= x <= 2pi

given the graph of f(x) = x sinx, 0<=x<=2pi assuming that a quantity y changes at a rate of y' = xsinx, find by how much it will increase or decrease over 3pi/2 <= x <= 2pi

Expand [1+x^2(1+x)]^7 in ascending powers of x as the term in x^8.

The widths (in meters) of a kidney-shaped swimming pool were measured at 3-meter intervals as indicated in the figure. Use the Midpoint Rule with n = 4 to estimate the area S of the pool if a1 = 15.5, a2 = 18, a3 = 17, a4 = 14, a5 = 12.5, a6 = 12, and a7...

In 69 games, a player blocks 234 shots, what is his blocks per ratio?

Need a lot of help! Specific gravity of a drug is 0.9815. How many cc of this drug should be administered for a dose of 215mg?

When a particle is located a distance x meters from the origin, a force of cos(x/4) newtons acts on it. How much work W is done in moving the particle from x = 1 to x = 3?

Karen has a mass of 62.60 kg and she rides the up escalator at Woodley Park Station of the Washington D.C. Metro. Karen rode a distance of 62 m, the longest escalator in the free world. How much work did the escalator do on Karen if it has an inclination...

The tension in a string from which a 5.4kg object is suspended in an elevator is equal to 53.02N. What is magnitude of the acceleration a of the elevator? The acceleration of gravity is 9.8 m/s^2

A ﬁgure skater begins spinning counterclockwise at an angular speed of 4.6π rad/s. During a 4.6s interval, she slowly pulls her arms inward and ﬁnally spins at 7.6π rad/s. What is her average angular acceleration during this time interval? Answer in units...

A girl sitting on a merry-go-round moves counterclockwise through an arc length of 3.36m. If the girl’s angular displacement is 2.96 rad, how far is she from the center of the merry-go-round? Answer in units of m.

A diver performing a double somersault spins at an angular speed of 4.5 π rad/s precisely 0.70s after leaving the platform. Assuming the diver begins with zero initial angular speed and accelerates at a constant rate, what is the diver’s angular accelerat...

Complete and balance the following equation: Cr2O7{2-}(aq)+CH3OH(aq)-->HCO2H(aq)+Cr{3+}(aq) Any feedback would be great, thank you so much.

Consider the voltaic cell Zn(s) + Cu{2+}(aq)--> Zn{2+}(aq)+Cu(s) {}=charge Under standard conditions, what is the maximum electrical work, in Joules that can accomplish if 60 g of copper is plated out?

Calculate the cell potential for this voltaic cell at 298K if it is constructed using solutions of .25M Ni(NO3)2 and .01M Cu(NO3)2 Any explanation would be spectacular

Jim begins a job with a starting salary of 27000 dollars. she is guaranteed a raise of 4.75% each year. Sarah also starts a job with a salary of 27000 dollars, she is guaranteed a raise of 1500 dollars each year. What will be Jim's salary after five years

An external force F is holding a bob of mass 725 g in a stationary position. The angle that the massless rope makes with the vertical is θ = 33°. (a) What is the magnitude, F, of the force needed to maintain equilibrium in N? (b) What is the tension in th...

graph each set of lines to form a triangle. find the area and perimeter. y=2, x=5 , and y=x Answer is Area = 4.5 units Perimeter = 6 + square root of 2. I don't know how to graph this. What does y=x mean?

This is a projectile motion question. A ball with a mass of .4 kg, initially at rest is kicked directly toward a 3 meter fence from a point 20 meters away. The initial velocity is 17 m/s at an angle of 35 degrees. The ball is hit by nothing and there is n...

A cylindrical slime tank is placed so that the axis of the cylinder is horizontal. Find the fluid force on a circular end of the tank if the tank is half full, assuming that the diameter is 6 feet and the slime weighs 54 pounds per cubic feet?

A spherical oil tank with a radius of 10 feet is half full of oil that weighs 60 pounds per cubic foot. Its top is 6 feet underground. How much work is needed to pump the oil out of the tank through a hole in its top? How do I solve this? Does the fact th...

In guinea pig, short hair (L) is dominant to long hair (l) and the heterozygous condition for yellow coat (Y) and white coat (y) gives cream coat. A short haired guinea pig is bred to long haired white guinea pig and one of the offspring is a long haired...

Calculate the momentum of a 0.1 kg rifle bullet traveling 500 m/s. Answer in units of kg•m/s

Calculate the pH of a 0.44 M aqueous solution of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the resulting 5.5e-10 in Kw=([H+][Cl-])/[NH4Cl] , using that to get the [H+], but it isn't correct and I don't know what else to do.

What was the purpose of the Adams-Onis Treaty? Can some help me answer this question?? Ms. Sue??

Calculate the concentration of H3O + present in 0.377 M H2CO3. Answer in units of mol/L I know the Ka of H2CO3 is 4.3E-7. But I don't know what to do from there. (Or, I'm not getting the correct answer at least)

Alright, this time, I know I have not mistyped my answer. Find the initial concentration of the weak acid or base in an aqueous solution of hydrazine (NH2NH2) with a pH of 10.16. Kb = 1.70 ×10−6 Answer in M I've tried going from 10^-pH then using that (as...

Hey Bob, What is the pH at the point during a titration when 20 mL of 0.200 M HCl has been added to 30 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10−5 for NH3. Answer in units of pH. I've gone about getting the mmol of HCl and NH3, gettin...

What is the unit rate of ounces. A hint is 48 ounces cost costs 3.00 dollars. I divided 48 by three but and got 16 cents but when I multiply by 48 it doesn't equal 3 dollars

Molybdenum (Mo) is a heavy metal that can have severe health effects on humans and animals. Tailings from a mining operation in Colorado have polluted surface waters used by grazing animals with Mo. Based on the following information determine the concent...

At 20◦C the vapor pressure of pure methanol (CH3OH) is 89.0 torr and of pure water (H2O) is 17.5 torr. A solution of methanol and water has a total vapor pressure of 35.5 torr at 20◦C. Calculate the mole fraction of methanol in this solution. Assume the s...

Karl says that you can take the square root of each side of an equation. Therefore, he says that (x + 5)2 + ( y – 7)2 = 36 and ( x + 5) + ( y – 7) = 6 are equivalent equations. Emily says the equations are not equivalent. Who is right? Explain your answer...

This isn't quite an HW question, I'm needing any site that gives practice Free Response problems for equilibrium for AP Chemistry if there are any for study and practice.

If the volume of a balloon is 5.0 L at 22 degrees Celsius, what will be the new volume if the balloon is heated to 75 degrees Celsius? Should the volume increase or decrease? 5/22=x/75 x=17.045

Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered, meagerness, merit, mock, obliged, resentful, tedious, terse, treacherous, vast. When it looked like all hope was lost for winning the...

Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered, meagerness, merit, mock, obliged, resentful, tedious, terse, treacherous, vast. The group of friends _________ around the coffee shop...

Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered, meagerness, merit, mock, obliged, resentful, tedious, terse, treacherous, vast. The fact that the lottery winner flaunted his newly ac...

Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered, meagerness, merit, mock, obliged, resentful, tedious, terse, treacherous, vast. While most people in Los Angeles will go to a Dodger's...

Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered, meagerness, merit, mock, obliged, resentful, tedious, terse, treacherous, vast. While being an extra on a movie set may seem fun and e...

Word Bank: deliberately, derision, despair, diligent, fatigue, felicitous, fervent, impudent, insolence, keen, lingered, meagerness, merit, mock, obliged, resentful, tedious, terse, treacherous, vast. While most museum visitors displayed respect for the a...

Find the smallest positive integer n for which 126n cube root is a whole number

A train is traveling south at 23.5 m/s when the brakes are applied. It slows down with a constant rate to a speed of 5.01 m/s in a time of 8.73 s. How far does the train travel during the 8.73 s? I have already found -Acceleration during braking: -2.12m/s

A 20-kg child running at 1.4 m/s jumps onto a playground merry-go-round that has inertia 180 kg and radius 1.6 m. She is moving tangent to the platform when she jumps, and she lands right on the edge. Ignore any friction in the axle about which the platfo...

A 2.6 kg toy locomotive is pulling a 1.7 kg caboose. The frictional force of the track on the caboose is 0.52 N backward along the track. If the train is accelerating forward is 3.1 m/s2, what is the magnitude of the force exerted by the locomotive on the...

What type of water evaporates quicker:well water or salt river water?

4.80 L of N2, at 25 ∘C and 1.22 atm , is mixed with 1.80 L of O2, at 25 ∘C and 0.122 atm , and the mixture allowed to react. N2(g)+O2(g)→2NO(g) How much NO, in grams, is produced?

A certain diving bell for use in the ocean has a square window measuring 0.250 m on each side. The inside of the bell is pressurized and maintained at a pressure of 2.00 atm. The mass density of seawater is 1025 kg/m3. How deep can this bell be lowered be...

1. Rewrite the expression 1/2ln(x – 6) + 3ln(x +1) as a single logarithm. 2. Rewrite the expression 1/3[ln x – 2ln(1 – x)] as a single logarithm.

An architect wants to design a window in the shape of a rectangle capped by a semicircle. If the perimeter of the window is constrained to be 24 feet, what dimensions should the architect choose for the window in order to admit the greatest amount of ligh...

the length of a rectangle is 4 less than 3 times the width if the perimeter is 48 inches find the length and the width

The fifth grade class was 3/5 boys. Of those boys, 4/6 had brown hair. What fraction were boys and had brown hair?

4Fe + 3O2 = 2Fe2O3 158g of Fe will react with how many litres of O2 to produce the maximum amount of Fe2O3

A Caterer has 8 cups of red candies. How many cups of white candies must she add to the red candies to create a candy mix that is 30% red candies.

I am a middle-schooler that is going to skip a year to go straight to high school. I have been looking for scholarships I can apply to now. Do you guys know any good sites?

why do you think the ratio of people with HIV/AIDS is lower in Northern Africa?

Find the volume of a solid whose base is bounded by the parabola x=y^2 and the line x=9, having square cross-sections when sliced perpendicular to the x-axis.

Find the centroid (x¯,y¯)(x¯,y¯) of the region bounded by: y=5x^2+6x y=0 x=0 x=6 I know the integral (think, at least) is from 0 to 6 and between the first and second equation given, but I missed this lecture and have no idea how to find the center of mas...

In the Unit 4 lecture on elections, you learned about the median voter theorem. Describe the median voter theorem as it was explained in the lecture. Now, think about the political parties and leadership roles you learned about in Unit 5. How do political...

A 0.8870-g mixture of sodium chloride and potassium chloride is dissolved in water and silver nitrate is added. The AgCl that precipitates has a mass of 1.913 g. Calculate the percent by mass of potassium in the initial mixture。

A crew team rows a boat at a rate of 20 km/h in still water. In practice on a river, the team rows for 30 minutes up the river (against the current), and then for 30 minutes down the river (with the current). The speed of the river current is 1.5 km/h. Ho...

When copper(II) nitrate reacts with sodium hydroxide, copper (II) hydroxide is produced. How many grams of Cu(OH)2 can be prepared from 12.7g of Cu(NO3)2 and excess NaOH?

What is the length of the hypotenuse of a 30-60-90 triangle with a longer leg of length 16m?

what is the rate of discount if a sweater regularly priced at $45. and sold for $36.

Answers

The following answers were posted by visitors named Ethan.

never mind it was 12

so Fe did that... im getting confused because i to oxidize means to lose electrons that makes it more positive and then reduction is actually the addition of electrons

Oh sorry, haha thank you for correcting me and thank you for helping me out.

This is all I was provided. I don't get it either.

what number is between 0.1 and 0.24

That sounds like a good title! Thanks!

I'm stuck at part a, I don't know what the function would be

I don't know the answer, but I know that in this particular question the plane is flying at an altitude of 9750 metres.( The q. is in Nelson Functions 11 pg.319 #8)

Thanks for the help!

I'm not sure, but I think that the first sentence needs another comma to separate the state from the city (if Winston is a city in Colorado). Also, in the first sentence, I think that John Pearson is the person living in Colorado, and not being addressed....

You actually need parentheses around '2200 + 1.50x' when you are dividing to find the average. So (2200 + 1.5x)/x would be my answer. (I removed the 0 after 1.5 also, as 1.5 is the same number as 1.50.)

"I get another chance" is the hypothesis. "I will do better" is the conclusion.

Multiply the two probabilities together. 2 5 10 - x - = -- 7 7 49 There is a 10/49 chance that AT LEAST one of them is running on a given day. I think.

Disregard my previous answer. You should add the probabilities. 7/7 chance.

There is a 10/49 chance that BOTH of them are running.

Ok idk haah post if u like this coment

I understand how the first and third equations are used to find the answers, but how is the second equation (mg = Tcosa) used?

To solve that last integral, you have to use the substitution rule. u= x^2 + 1 du= 2x Therefore the integral becomes: -1/2∫(2/u) du Factor out the 2 -∫1/u du Integrate -ln(u) Which is equal to -ln(x^2 +1) Since u= x^2 + 1

Sorry, I misread that as 2x instead of x^2.

I(220-a-r)+r I=.5 a=45 r=85

Books never written

I did the problem. I found the fluid force to be 54 times the integral from -3 to 0 of (-y)(2)(root(9-y^2)dy my final answer was 972 pounds. Is that correct? note from my work: h(y)=-y L(y)=2x=2root(9-y^2)

is this for artofproblemsolving? I have the same question. Idk but I think it is close to 343√3/3π.

Correction. I meant Ka=([H+][Cl-])/[NH4Cl] not Kw

I made a silly mistake and inputted the correct answer of 4.805909915 as 4,805909915, I noticed as I looked at my previous answers, sorry for all of this.

I've figured out my mistake, mentioned above your post, mistypes when inputting answers are a terrible thing :p

The UT (University of Texas) Quest system, Online quizzes, takes it out further for it to count as correct, when I am taking in class tests on paper, yes, it's cut down using significant digits.

Well, I've tried going using 4.3e-7=x^2/0.377 to get to what x equals, I've been getting 0.0069, but it's incorrect.

Once again I was foolish and mistyped an earlier answer, getting 4.02e-4 for my answer. I had not put in the 0 between the 4 and the 2 when submitting.

Remember the system I use for online homework does not care about significant digits, it goes out to /at least/ 6 decimal places. And I butchered spelling rearranging.

1.301029996, thanks Bob

then what is 1? thanks though

If it was to be built in real life the difference in height will increase potential energy, the mass will increase, and therefore because it was increased uniformly F=MA acceleration will be constant. so yes.

So if by LCD you mean Least Common Denominator, I would start off with finding values of 7 8 12 that are the same, so by multiplying 7 and 8 you get 56 which is not a multiple of 12. so we must now find the LCM of 56 and 12 which is 168 found by looking a...

Thank you! I was stuck on this problem

So, vf = final velocity = 5.01m/s vi = initial velocity = 23.5m/s a = acceleration = -2.12m/s^2 d = distance I plugged everything in and got 0.045. Is this the correct way to solve? 5.01^2 = 23.5^2 + 2(-2.12)d 25.1001 = 548.01d d = 25.1001/548.01 Thanks!

Write a subtraction equation with a difference of 54.57. Then draw a number line to show between which two whole numbers the difference lies

obviously the lengths are 23.5, and 27.

I will guess the length of the lace shall be larger than 51. It shall be larger than twice of the circumference. So I would say (3) 101.

Coincide. A pun on go inside

Thank you so much mili

thanks @slimshady

The dude who talked about Marilyn is right

I believe that the answer to 1 is C because, according to the first law of thermodynamics, energy can be converted from one form to another but is neither created nor destroyed. So, the total energy of the universe would remain the same even if the system...

Warmer temperatures increases the kinetic energy of water molecules which enables them to escape the water surface faster

It was all correct

The Answer is 34. Hint: try calculating two numbers at a time (ex. 59 minus 10= 49 then do 49 minus 15 = 34.

Use calculator do solve. 67 times 3 is 201.

What's the question?

The so-called Equal Rights Amendment has never been ratified. In 1848, a group of abolitionist activists–mostly women, but some men–gathered in Seneca Falls, New York to discuss the problem of women's rights. (They were invited there by the reformers Eliz...

Thank you so much!!

Is the answer around 18?

2 & 3 is not use in generic use because it is referring to a certain flower.

Thank You Ms.Sue

aww MAN!!!! No one responding!

I am going to do the same test right now - I NEED HELP PLEASE!!!

2C4H10 + 13O2 ==> 8CO2 + 10H2O

Than South Africa

I really appreciate you helping everybody Ms.Sue . THANK YOU!!!

Well you i could not awnser that question cuz u copied it from a online assesement and it shows no values

cooling and freezing

D=4 D+T=20 4X5=20 4X4=16 daisies+4 tulips=20,so16D-4T=12 She has 12 more daisies than tulips

1.A 2.D 3.B 4.C

to increase friction

a snail is at the bottom of a well. in the first 10 minutes, the snail climbs 23 7/12 inches. In the next 10 minutes, it climbs 19 5/6 inches. How far is the snail from the bottom of the well after 20 minutes?

write in scientific notation 135,000,000=?

So, is it the one most gave or the anonymous gave?

a. 263:64 b. 1:63

Thank you so much

Wow, calm down m8

where does 80 come from?????

Maybe non-cooperative colleagues. difficult boss

Then you are a cheater

SOrry this was the first part of the question To prepare 20 mL of 15 mM NaCl, how much NaCl would you need to weigh I got 0.021915g

I get that. but what about how would you prepare 1mL of 1 mM NaCl using the NaCl solution you prepared in part 1?

It cannot be kinetic because it is not moving temporarily. So it is either potential or elastic potential

No offense taken, Although I want to be a chemist someday. Or a CSI(crime scene investigator) which studies some chemicals

Also I have 100%. I am pretty much a math whiz so of course I have 100% in science you need to be good in math to be good in science

Nice name Also 3. is actually A. Corn is a renewable source. Wind is not

Yes but not unit tests or any thing like that

Yes, because it says the meaning of the answer in the second fact

what are the answer choices

My topic is pesticides

Good to know I'm not the only one confused by this problem

No Ms. Sue. My problem is exactly what I put. That what my teacher gave us.

what era the right ones