Question

what is the volume of this?

Answer 1

What is the area of the base?

Answer 2

idk what the formula for area is for an oblique cone

Answer 3

it's the same for a regular cone

Answer 4

have a look at this

http://www.mathopenref.com/coneoblique.html

Answer 5

807.28 ? fo the area

Answer 6

how are you getting that?

Answer 7

A=πr(r+h2+r2)

Answer 8

The formula you should use is

\[\Large V = \pi*r^2*h\]

since you want the volume

Answer 9

1,513!!

Answer 10

right?

Answer 11

1,513.20046147909 and that rounds to 1,513

good job

Answer 12

can you help me with one or two more??

Answer 13

I can help with one more

Answer 14

the volume of a sphere is 2,254pi m^3. what is the surface area of the sphere?

Answer 15

First use the volume of a sphere formula

\[\Large V = \frac{4}{3}\pi*r^3\]

Answer 16

to determine the radius (given the volume)

Answer 17

wait so how do i find the radius? cause i have to plug it into that right?

Answer 18

you plug in V = 2254pi and solve for r

Answer 19

\[\Large V = \frac{4}{3}\pi*r^3\]

\[\Large 2254\pi = \frac{4}{3}\pi*r^3\]

\[\Large r = ???\]

Answer 20

11.91

Answer 21

roughly, yes

Answer 22

then you use this radius to find the surface area

Answer 23

Surface Area of a Sphere

\[\Large SA = 4\pi*r^2\]

Answer 24

1,783.3 m^2

Answer 25

I'm getting

4*pi*11.91^2 = 1,782.51579554269

so that's close

Answer 26

there's probably roundoff error in either of our work

Answer 27

oh yeah probably mine. its multiple choice tho so i got my answer!! thank you :)

Answer 28

Turns out the radius is more like 11.91255883

so...

4*pi*11.91255883^2 = 1,783.28181483214

Answer 29

ok great