Question

A scientist wants to estimate the volume of Earth and uses a sphere as a model for the planet.
According to NASA, Earth’s diameter is 12,756 km. The volume of a sphere is four-thirds of the
product of Pi (π) and the radius cubed. Using 3.14 for π and that the diameter of a sphere is
equal to two times its radius, estimate the volume of Earth.

Answer 1

ummm

Answer 2

let me see

Answer 3

Diameter is 12,756

Answer 4

diameter= radius times 2

Answer 5

ok

Answer 6

25512

Answer 7

So you would divide the diameter by 2 to find the radius.

Answer 8

6378

Answer 9

yes, know do you know the formula for the sphere?

Answer 10

no it does not say

Answer 11

\[\frac{4}{3}πr^3---->Sphere\]your π is 3.14, so --->\[\frac{4}{3}\times 3.14 \times r^3\] the radius is 6378\[\frac{4}{3}\times 3.14 \times (6378)^3\]

do the 6378^3 first.

Plug in and solve.

Answer 12

ok wow this website really works

Answer 13

Sure it does, and hope you understand how to do this on your own in the future. Cuz this is the website's goal- teach.

Answer 14

ya ok so 6378 x 3

Answer 15

6378 is to the third power.
then times pi, or times 3.24
then times 4/3

There is your answer.

Answer 16

i think this is wrong what do u think 20427458

Answer 17

1.0862303e+12

I plugged this into google calculator and that's the result.

Answer 18

sorry im so bad at math ahaha do u want me to do that

Answer 19

write this as an answer?
I think that when it comes to this, google calc is, although there are things at which it is clearly wrong.

Answer 20

ok thank you so much

Answer 21

Anytime!

Answer 22

haha would you be available to help with one more

Answer 23

Yes, but please post a new question, because threads get too long otherwise; ty!

Answer 24

ok so i will post a new problem i clicked add a fan

Answer 25

k im closing it