Question

HELP ME????

Answer 1

The formula for finding the volume of a cylinder is V=(pie) * r^2 *h where r is the radius of the base, and h is the height of the cylinder.

a) Solve the equation for h.



b) Use your answer from part a) to find the height, h, of a cylinder with volume of 2240 cubic centimeters and radius of 5 centimeters.





Show your work.

Answer 2

just rearrange the equation of h is one side and the rest is on the other side.

Answer 3

then for part (b), substitute in the numbers :)

Answer 4

a little more help on A please

Answer 5

V=h * r^2 * (pie) ????????

Answer 6

\[\huge V= \pi r^2 h\]Divide both sides by pi.\[\huge \frac{V}{\pi}=r^2h\]Divide both sides by r^2.\[\huge \frac{V}{\pi r^2}=h\]
Is this what you were trying to do ms katie? :o

Answer 7

And also, there's no E in Pi, it's the number Pi, not an apple pie silly! c:

Answer 8

ok sooo b would be.. \[\sqrt{2240\div (\pi*h)}=5\]

Answer 9

Hmm it looks like you have your h and r in the wrong spot. \[\huge \frac{V}{\pi r^2}=h\] Becomes...\[\huge \frac{2240}{\pi (5)^2}=h\]

Answer 10

I mean, yes your equation is correct.. but you didn't want to solve for R, you're giving yourself more work :O

Answer 11

so the answer is ... \[h=\frac{ 448 }{ 5 }\]

Answer 12

Hmm, where did your pi go? :\

Answer 13

pi is next to 5

Answer 14

it didnt show up

Answer 15

k looks good c:
With a problem like this, you probably want to simplify to a decimal.

Answer 16

Not necessarily though, depends on what your teacher prefers c:

Answer 17

which would be?

Answer 18

If you don't have a Pi button on your calculator then just use 3.14.
Punch it in! :D

Answer 19

Thank you(:

Answer 20

If your teacher doesn't specify I would leave it exact:
\[h= \frac{448}{5 \pi}\]

Answer 21

ok