SOLUTION: Help!! I'm math stupid! I have no idea how to solove this problem, unforutnately I'm running on a dealine. Can anyone assist me? The volume of a can (like tin can) is given by

Algebra ->  Linear-equations -> SOLUTION: Help!! I'm math stupid! I have no idea how to solove this problem, unforutnately I'm running on a dealine. Can anyone assist me? The volume of a can (like tin can) is given by      Log On


   

Question 84044: Help!! I'm math stupid! I have no idea how to solove this problem, unforutnately I'm running on a dealine. Can anyone assist me?
The volume of a can (like tin can) is given by V = πr2h where r is the radius of the can and h is the height of the cylinder. Suppose the volume of the can is 121 cubic centimeters.
a) Write h as a function of r. Keep "" in the function's equation.
Answer:
Show work in this space.



b) What is the measurement of the height if the radius of the can in 3 centimeters? Round your answer to the hundredth's place.
Answer:
Show work in this space.



c) Graph this function.
Show graph here.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
a)
V%2F%28pi%2Ar%5E2%29+=+cross%28pi%2Ar%5E2%29%2Across%282%29h%2F%28cross%28pi%2Ar%5E2%29%29+To solve for h divide both sides by pi%2Ar%5E2
So h equals
h=V%2F%28pi%2Ar%5E2%29
Since its a 121 cubic centimeter can h equals
h=121%2F%28pi%2Ar%5E2%29

b)To find out the height if the radius is 3 cm, just plug in 3 for r and 121 for V of the 100 cubic centimeter can (this is given above)
h=121%2F%28pi%2A3%5E2%29Let r=3,V=121
h=121%2F%289%2Api%29
h=4.2795Approximately

So the height of the can is about 4.28 cm

c)
To graph this function, let r be x and h be y.
graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+20%2C+121%2F%283.14%2Ax%5E2%29+%29 Graph of y=121%2F%28pi%2Ax%5E2%29