Question

Find the volume of the cone. (Round to the nearest tenth.)
(I almost got it, but I keep messing up somewhere every time I try and solve it)

Answer 1

These are the answer choices:



1250.7 mm3

2014.1 mm3

289.4 mm3

1229.4 mm3

Answer 2

formula is
V= 1/3 pi r^2 h

Answer 3

I got the formula. But it only gives the height and I guess the 38 is an angle, if you look close.

Answer 4

yep, so we need to use trigonometry to get the r value for the formula
what trig function would we need?

Answer 5

tan. right?

Answer 6

exactly!

Answer 7

Yay! So you do tan(38) = 9/x?

Answer 8

correct. solving algebraically that gives us
r = 9/ (tan(38))

Answer 9

i got. r = 11.52. now I can find the volume!

Answer 10

yes

Answer 11

although, I didn't not get r =11.52 so, you might want to double check that

Answer 12

well, I rounded.

Answer 13

ok

Answer 14

Yeah i don't think I did it right.

Answer 15

what did you get? I think you should be good to go. I got one of your choices :)

Answer 16

1255mm^3

Answer 17

But it's not an answer choice./:

Answer 18

yes, it's a little off from rounding, but that is okay. Which answer would you pick?

Answer 19

1250.7

Answer 20

that's it :) and nothing else is close so you're good to go

Answer 21

Yaaay! Thankyou[: I actually learned something from this, thankyou![:

Answer 22

I said thankyou twice.... lol

Answer 23

happy to help :)