The moon is a sphere 2160 miles in diameter. What is its surface area in square miles? Use pi = 3.14 and give the answer to the nearest ten thousand.
1,560,000 sq. mi
110,470,000 sq. mi
14,660,000 sq. mi
16,980,000 sq. mi
2007-02-13 03:54:36 · 4 answers · asked by heather n 1 in Science & Mathematics ➔ Mathematics
SA = 4 * pi * r^2
r = diameter/2
d = 2160, so r = 1080
Now just plug in the numbers and do the calculation.
2007-02-13 03:59:28 · answer #1 · answered by Mathematica 7 · 0⤊ 0⤋
per www.math.com, the formula for the surface area of a sphere is = 4Ïr^2
The diameter of the moon is 2160 miles; the radius is half of that, or 1080 miles.
4 * Ï * 1080^2
= 4,665,600 * Ï
= 14,649,984 square miles.
Hope that helps.
2007-02-13 12:03:37 · answer #2 · answered by Tim P. 5 · 0⤊ 0⤋
Surface area of a sphere is
SA = 4pir^2
so 4pi(2160/2)^2
14,657,414
2007-02-13 11:59:55 · answer #3 · answered by leo 6 · 0⤊ 0⤋
Surface area = 4Ïr² = 4Ï x 1080² miles²
Surface area = 14,649,984 miles² and this is closest answer to 14,660,000 miles²
2007-02-13 12:05:29 · answer #4 · answered by Como 7 · 0⤊ 0⤋