A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
1) seventy percent of the Earth's surface is covered with water. find the approximate surface area of the earth that is water
2) find the volume of the earth
radius is 3963mi
anonymous
 5 years ago
1) seventy percent of the Earth's surface is covered with water. find the approximate surface area of the earth that is water 2) find the volume of the earth radius is 3963mi

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You can easily find formulas for surface area and volume of a sphere on Wikipedia. That should help you.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i tried and it didnt help

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Assuming that Earth is spherical... What's the formula for volume then? Can you find and type it here?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sphere = (4/3) pi r 3

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Right. \[4 \div 3 * \Pi * r^{3}\] What does 'r' in this formula stand for?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Can you do the math then? You have all the numbers! Just divide/multiply and you'll get the answer to (2).

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Too little. Don't forget that: \[r^{3} = r* r * r\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The number I'm getting is roughly 260,704,193,914 cubic miles or \[2.60 x 10^{11}\] cubic miles.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0(cubic because you multiplied a number of miles by a number of miles by a number of miles :))

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Now off to the first question. You'll have to calculate the area in a similar fashion, then calculate the percentage of it that is water.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0approximately 197,359,487mi

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Square miles. The number is correct. Well done. :)
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.