The surface area of a sphere is found using the formula , where r is the radius. If the surface area of a sphere is 64 square fe
et, what is the radius, in feet? A. –4 B. 16 C. 4 D. –16
1 answer:
Answer:
It should be C, I believe?
Step-by-step explanation:
The surface area of a sphere can be found by the formula: A=4πr²
If the area is 64 square feet. -----> square feet means doubled
A=64² = 4096 feet
4096 =4πr² (divide 4π on both sides)
4096 ÷4π = 1024π
1024π = r² (square root r on both sides)
r = 56.718523229
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I believe you set them equal to each other.
2x+4=5x-9
x=4.3
2(4.3)+4=12.6
I think the answer is 12.6
Answer:1296
Step-by-step explanation:1200*.04=96
1200+96=1296
Answer:
x^2 + 16x + 60 = 0
Step-by-step explanation:
Add 16x to both sides of the given equation. We get x^2 + 16x + 60 = 0.
well i would say probably 11 (:
