carly

How does africa's mineral wealth effect the economy? The mineral wealth is the only thing that attracts investment. Without investment, the economy is at a standstill. Political and social instability is making that investment very risky.

18 years ago

Explain why adaptations of organisms to interspecific interactions do not necessarily represent coevolution. What would a researcher have to demonstrate about an interaction between two species to make a convincing case for coevolution? i don't understand...

18 years ago

Peter is reading a 103 page book. He has read three pages more than one fourth of the number of pages he hasn't yet read. How many pages he has bot read? Estimate how many days it will take Peter to finish the book if he reads about 8 pages per day. I'm c...

17 years ago

Find the lateral and surface area of the right rectangluar prism whose length is 7 cm, width is 5 cm and height is 1.5 cm. I did 2(7 x 1.5+ 1.5 x 5) and I got 36 as my lateral area. Then I add 36+ 2(7 x5) and I got 106 as my surface area. Is this right?

17 years ago

The sum of two numbers is 38. Their difference is 12. What are the two numbers?

17 years ago

The perimeter of a rectangle is to be no greater than 300 in., and the length must be 125 in. Find the maximum width of the rectangle.

17 years ago

One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.

17 years ago

how do I find the slope of (0,5)(5,0) any help would be great.

17 years ago

can someone show me how to find the slope of this one too (-5,3)(5,3) thanks so much

17 years ago

how do water powered mills work???? please help!!!!!!!! due tomorrow only in 5th grade make it not complicated

17 years ago

what must be add or removed in order for matter to change state?

17 years ago

5432-54342890n3-432983n-34njnkjdm-49-fjsok n=4569 j=498323 k=678 d=567 m=5803 f=5647 s= 128 s=647382

16 years ago

I do not understand this at all, can someone explain? Predict how much of 0.3 M NaOH it will take to neutralize 10 mL of 0.1 M HCl.

16 years ago

If it is Thursday at 11pm in Singapore, what day and time is it in Tokyo?

16 years ago

A rectangle is plotted in the coordinate plane. The vertices (corners) of the rectangle are given as A(–2,3), B(4,3); C(–2, –2) and D(x,y). What is the ordered pair for point D?

15 years ago

you are depositing $1000 dollars in a savings account and are given the following options. 6.2% annual interest rate, compounded annually 6.1% annual interest rate, compounded quarterly 6.0% annual interest rate, compounded continuously for each option, w...

15 years ago

who is Rosa Parks relitives

15 years ago

1 third of 18 kg is

15 years ago

Assume that the student has a cup with 15 writing implements: 8 pencils, 5 ball point pens, and 2 felt-tip pens.In how many ways can the selection be made if no more than one ball point pen is selected?

15 years ago

In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you

14 years ago

In detail can someone please explain to me how cooking eggs makes them safe to eat in connection with enzymes Thank you I understand that enzymes are killed because of the heat as it is a factor in destroying the enzymes activity but how does this explain...

14 years ago

What is the molarity of OH- in a 5.78×10-3 M C6H5CO2Na solution that hydrolyzes according to the equation. C6H5CO2-(aq) + H2O(l) = OH-(aq) + C6H5CO2H(aq)

14 years ago

I've been trying to solve these for while now, and i keep getting them wrong.... please help!! A solution of NH4Cl hydrolyzes according to the equation. If the [NH3] in the solution after hydrolysis is 0.00000508 M, calculate the equilibrium concentration...

14 years ago

what is the force excerted on the surface of a bowling ball that has a diameter of 32cm immersed in water to a depth of 555m?

14 years ago

By the cofunction property, cos 33° = sin _______

14 years ago

a store is offering a discount of 30% on a suit. There is a sales tax of 6%. A) using a composition of function, represent this situatio in which the discount is taken before the sales tax is applied. B) using a composition of functions represent the situ...

14 years ago

Jasmine is a manufacturing engineer who is trying to find out if she can use a 20-inch-by-12 inch sheet of cardboard and a 15-inch-by-16-inch sheet of cardboard to make boxes with the same height and volume. Is such a pair of boxes possible? Please give m...

14 years ago

what contributions did paul klee make in the 1920's?

14 years ago

triangle CAT has vertices C(4,9), A(8,-9),T(-6,5) M is the midpoint of TA . find the length of the median CM

14 years ago

there are 3 nickles 2 dimes and 5 quarters in a purse. the three coins are selected in succession at random. find the probability of selecting2 nickles , then a quarter.

14 years ago

What is the area of the trapezoid given top is 14, one side is 7, and bottom corner is 65°?

14 years ago

for the list of chemicals below, write complete, balanced equations for all possible reactions that would lead to an insoluable salt. KCl, BaCl2, AgNO3, Pb(NO3)2, K2SO4, HNO3

13 years ago

a 3ft tall boy casts a 4ft shawdow at the same time a tree casts a 72 foot shawdow using the pythagorean therem find the distance from the top of the tree to the tip of the shawdow

13 years ago

14. cat \kat\ n. 1. a carnivorous mammal (Felis catus) long domesticated as a pet and for catching rats and mice; 2. any of a family of carnivorous mammals (as the domestic cat, lion, tiger, leopard, jaguar, cougar, wildcat, lynx, and cheetah) What do the...

13 years ago

customer arrive at alocal ice cream stand at an average rate of 16 perhour. what is the probability that 2 customer will arrive during the next 15 minutes?

13 years ago

A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the...

13 years ago

For long range communication an elephant uses a low frequency rumble that is undetectable to human ears. One elephant can pick up another elephant's call from a distance of 10 km. The frequency of this rumble is about 13 Hz. How fast does the rumble trave...

13 years ago

What grammatical structure is the italicized portion of the sentence? We walked along the mountain path looking for unusual flowers.

13 years ago

susan, joanne, and diane are triplets. susan has red, blue, green, and yellow sweaters. janne has green, red, purple, and white sweaters. diane's sweaters are red, blue, purple, and mauve. each girl has only one sweater of each color, and will pic a sweat...

13 years ago

A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b...

13 years ago

find each absolute value /14/... p.s the lines are suppose to be straight.

12 years ago

solve each equation /y/=17 /s/=0 -x=-4 -y=6 help!!!!

12 years ago

if a test has a mean of 150 and a standard deviation of 30, we know that: a)50% of the respondents scored between 180 and 210 b)68% of the responents scored above 120 c)50% of the respondents scored between 120 and 210 d) 96% of the respondents scored bet...

12 years ago

Describe how the slope of a line relates to a trend line.

12 years ago

Given a set of data pairs, how would you decide whether to use interpolation or extrapolation to find a certain value?

12 years ago

Simply each expression. Use only positive exponents. (2t)^6 r^5/g^-3

12 years ago

Find the mass of potassium chloride and volume of oxygen at STP liberated when 0.5 moles of potassium chlorate are heated.Also find the moles and mass of oxygen evolved.

11 years ago

what are essay question i always get them on my test but i do not know what they are

10 years ago

if you toss a coin and roll a number cube, what is the probability that the coin shows tails and the number cube shows 4?

9 years ago

some spectators in the back row of the rodeo jeered at the clowns after the last event.

9 years ago

If the Red Sox have 14 fans, the Pirates have 42 fans, and the Phillies have 25 fans, what is the probability that a randomly selected fan is not a Red Sox fan? The total number of fans is 81, so I believe it would be 42 + 25 = 67/81 which is 82.7%. Howev...

9 years ago

The area of a circle of radius r is πr^2, which happens to be 1/2r times the circumference 2πr. Explain why this relationship should be expected.

8 years ago

If I have an equation, q(x) = x, and I have to identify what the graph of that would look like, isn't it just going to be a straight line? There are two straight lines to choose from -- one is horizontal across the x-axis on the 1, and the other is horizo...

7 years ago

When someone says write an exponential equation, what kind of format is that? I know a linear equation is y = mx + b, but what is an exponential equation?

7 years ago

I have an equation of P=(170-3x)(x-25) How do I determine the y-intercept I know I can determine the x intercepts by setting x = to zero, so those are easy to find, but I'm not sure how to find the y-intercept. Thank you.

7 years ago

is 8square root 2 + 2square root 2 equal to 10square root 2? Sorry, I don't know how to type that on my computer. So 8 next to the square root symbol with 2 underneath it + 2 next to the square root symbol with 2 underneath it. I'm thinking those are like...

7 years ago

I'm working on conversions and can't ever figure out when I need to multiply and when I need to divide. For example - 50L = ? gal I know 3.79 L = 1 gal but do I divide or multiple to get the correct answer? Or, 2 mi = ? m I know 1 m = 3.28 ft and 5280 ft...

7 years ago

I need to get a better understanding about relative difference. Do you know of any websites that would have practice problems that I could go to? Thank you.

7 years ago

I'm working on a Venn diagram - would you please check my work? The question is: A group of 95 respondents said they regularly watch Netflix, 60 said they watch Hulu, 20 said they watch neither Netflix or Hulu, and 35 said they watch both Netflix and Hulu...

7 years ago

John is buying floor tile to put in a room that is 10 ft by 15 ft. He has chosen tiles that are 18 in by 18 in. Assuming that he needs to buy 10% extra to be safe, how many tiles would he need to buy. I know that I need to buy enough for 150 square feet,...

7 years ago

I'm working on a project about buying a new car. It says: A common bit of financial wisdom is that a car payment should be no more than 20% of your monthly take-home pay. Set up and solve an equation to determine how much you would need to be making in ta...

7 years ago

I'm still working on my car project and wondering if you could check this- this question says: If x represents the number of months and P represents the total paid for the car, write a formula that describes the total amount you have spent on the down pay...

7 years ago

I'm working on a math project about a track and field olympic event. The question is, is the relationship between the years and time values linear or exponential? So I selected an event and I can see that as the years have passed, the time has decreased,...

7 years ago

One member of the debate team is going to be chosen President. Each member is equally likely to be chosen. The probability that a girl is chosen is 2/3 the probability that a boy is chosen. If the debate team has 20 people, how many girls are there?

6 years ago

I am doing a project for math class and it is asking for the relative change. In our book, the formula is relative change = new value - original value/original value. The project is we look up nutritional values of items at a restaurant and then we have t...

6 years ago

I posted the question below last week and while it was answered, thank you, I am still unclear about my original question of how do I know what is considered the NEW value and what is considered the ORIGINAL value. I understand there is a change, yes, but...

6 years ago

The height of a sunflower being grown for a botany experiment can be modeled with a linear equation with variables y (height in cm) and x (days after measurements started). The line has slope 2.9. Two weeks after measurements started, the height was 49.1...

5 years ago

(x - 5)(-.025x + 220) Is the answer -.025x^2 + 220x - 1100 OR -.025x^2 + 219.875x - 1100 I keep getting the first answer but in class the teacher said the answer was the second one and I'm getting frustrated because I can't get the second one!

5 years ago

A roller coaster is being built with a very steep drop and falls 64 feet over a horizontal distance of 160 ft. a. What is the percentage grade of this drop? Round to the nearest tenth of a percent. I did 64/160 = .4 so as a percentage that is 40% b. What...

5 years ago

When a soccer ball is drop-kicked into the air, the height h in feet of the ball after t seconds can be modeled by the quadratic function h(t) = -16t^2 + 32t + 4. a. When does the ball hit the ground? Round to the nearest thousandth of a second. I used th...

5 years ago

Nikki is planting tomato plants in her garden. She has 20 feet along the back side where she plans to plant as many tomato plants as she can fit. The instructions specify to allow at least 20 inches between the holes where the plants will be planted. Assu...

5 years ago

I am working on a problem about bacteria growing and I used my calculator to find the exponential equation to be y = 10006.06771(1.2297)^x First it asked how many bacteria would there be after 6 hours which was easy because I just plugged in 6 for x and t...

5 years ago

We are given a table starting with year 1992 and going until year 2000. It says these are the closing prices for NASDAQ Stock Index at the end of February. There are three columns in the table - the year, x, and the price. By the year 1992, the first year...

5 years ago

What is the difference if a quadratic equation is set equal to 0 or to y? For example: y = x^2 - 8x + 15 OR x^2 - 6x - 16 = 0

5 years ago

Direct vs. Indirect Variation The volume of the water in a swimming pool as it is filled at a rate of 200 gallons per minute. I said this is direct variation V = 200t The volume of the water in a swimming pool as the water drains at a rate of 200 gallons...

5 years ago

Direct vs. Inverse Variation Also this one: You purchase a new SUV; as age increases, the resale price decreases. I believe this would be inverse, but the answer packet says neither direct nor inverse. As I understand inverse, as one value goes up, the ot...

5 years ago

Inverse Variation I'm doing something wrong in my calculation but I can't figure out what -- The cost per person to rent a mountain cabin is inversely proportional to the number of people who share the rent. If the cost is $36 per person when 5 people sha...

5 years ago

Ok so i honestly have no idea what this is so if you could help me out it would be great!! Matthew will deposit $500 into an account earning 6.25% simple interest. Bodie will deposit $450 into an account earning 6.5% Compound interest. WHO has more money...

5 years ago

A cannon ball on the planet Earth is fired straight up in the air at a velocity of 150 m/s. How high does it go?

3 years ago

A stunt person performs a stunt where they run off the top of one building into a window two stories below (7meters down) in an adjacent building that is 6 meters away. How fast does the stunt person have to run horizontally in order to land in the window...

3 years ago

friction gravity

17 years ago

thank you so much

17 years ago

In my oppinion he is saying that each job has a diffenent sound it makes. If you listen to it it may seem like music

16 years ago

yes. Here is a way to remember. in the alphabet covalent comes first so it is #1 and ionic is #2 Covalent 1. two atoms with one type of ion Ionic 2. two atoms with two types of ions

16 years ago

yes it is you have to multiply the numbers yeah confusing

16 years ago

it is in my textbook so hahhahahah

16 years ago

ms.sue is wright i am wrong

16 years ago

sums phonics suptracting

15 years ago

I understand that enzymes are killed because of the heat as it is a factor in destroying the enzymes activity but how does this explain why its safe to eat eggs. I know that eggs may sometimes contain bacteria such as salmonella, so if the eggs are heated...

14 years ago

would it be acceptable with my explanation with enzymes?

14 years ago

you just divide the time by the distance since he ran at a constant rate

14 years ago

Ooops i meant you just divide the distance by the time NOT the time by the substance

14 years ago

Actually i have some classmates over and were working together and we don't all have the same name. Sorry.

14 years ago

Sorry for sounding rude thank you for the help.

14 years ago

the 6th term is 243.

14 years ago

approximate to the nearest inch the lenght of a rectangle whose diagnol measures 25.0 inches and whose width is 18.0

13 years ago

a ladder 39 ft long leans against a building and reaches the ledge of a window if the foot of the ladder is 15 ft from the foot of the building how high is the window ledge above the ground tot the nearest foot.

13 years ago

use pascals triangle 1 5 10 10 5 1 for example Expand (2 + 3x)5. Applying the general rule of ascending and descending indexes and the coefficients from Pascal we can immediately expand the above equation (if we set a to 2 and b to 3): 25 + 5(24)(3x) + 10...

13 years ago

no the open door policy granted equal trade opportunities to all countries

13 years ago

yup a

13 years ago

I can confirm that the answer above is correct.

10 years ago

a a d c

10 years ago

Essay Questions? i think Essay questions are for when you have to write or type something in your own word it that correct

10 years ago

oh ok i get it thank you

10 years ago

thank you

9 years ago

thanks anonymous

8 years ago

thank you

8 years ago

thank you

8 years ago

thank you

8 years ago

thank you?

8 years ago

thank you

8 years ago

the weird ie thing is supposed to be pi

8 years ago

why would it be expected though?

8 years ago

no, ok thanks i have one more question... Consider a billion-sided regular polygon that is circumscribed around a circle of radius r; how are its area and perimeter related?

8 years ago

1.37*10^6

8 years ago

karma is right

7 years ago

thanks cameron xoxoxoxo

7 years ago

Yes, sorry, that's what I meant to say. So I find the x intercepts by saying 170 - 3x = 0 and solving and x - 25 = 0 and solving. I found those to be (25, 0) and (56.67, 0) But if I set x equal to zero here, the x intercept will be (0,0) I have the soluti...

7 years ago

Oh my --- so sorry!!! Yes - thank you!! Please call it the Sunday blues.....

7 years ago

Thank you -- just quickly added those by hand!

7 years ago

What does the 1.5 represent that you divided by?

7 years ago

I am a little confused by your comments -- My equation of best fit, determined by the computer, is: Y=-.02496x+551.65 My event is 100M mens backstroke, and the first time they did this, in 1906, the time was 1:16.8 which would be 76 secons -- so I don't u...

7 years ago

Yes, the years are my x and the time in seconds is my y - The question is, is there a y-intercept - so technically, there WOULD be a y-intercept since the line would cross the y-axis??

7 years ago

1+2+3x4x8x9x6x7x8x7x7

7 years ago

I guess? I'm sorry to appear to dumb ... that is not obviously clear to me. That would make sense if I was losing weight or something like that, but in this particular situation, I have obtained values from the internet for nutritional values and also cal...

6 years ago

Yes, I understand what you are talking about, but these are examples of changes. This project that I am working on is about nutritional facts -- the only changes are what is showing on the internet and what I am coming up with based on number of grams of...

6 years ago

REINY -- I'm sorry - yes, that is what I keep getting too -- I had sooooo many answers written down all over my paper and then I typed the wrong one - thank you!

5 years ago

NVM - I think I figured it out - thank you anyway

5 years ago

But 180/8 does not equal 10????

5 years ago

can you please rewrite 1 3/4 as twentieths

5 years ago

c a b a ur welcome

5 years ago

What type of chemical reaction is this? 4KNO3 -> 2K2O + 2N2 + 5O2

4 years ago

name two physical properties of an object about which you can gather qualitative date.then name two physical properties of an object about which you can gather quantitative date.give an example of each kind of date

4 years ago

damon's response came after about ten minutes of crying because my teacher put that question in homework but didn't teach what it means. thanks soooooo much

4 years ago