A sphere has diameter 28 cm. If the diameter is divided by 2, what is the effect on the surface area?
1 answer:
Answer:
The surface area is divided by 4.
Step-by-step explanation:
Surface area of a sphere is 4πr².
When the diameter is 28 the radius is 14. So: 4π(14)² = 784π
If you cut the diameter in half you get 14. The radius is now 7.
4π(7)² = 196π.
784/4 = 196 so divided by 4.
You might be interested in
Answer:
6, 3
Step-by-step explanation:
The formula to find the area of a triangle is

If you have any more questions let me know!
Answer:

I hope I helped you^_^
Answer:
7x^2+2x-4
Step-by-step explanation:
a standard form is ax+by=c
5x^2 add 2x^2=7x^2 then -2x but when you have a -10 +6 you get -4 giving you the answer of 7x^2 +2x -4
Answer:
perp. -4
y + 6 = -4(x + 2)
y + 6 = -4x - 8
y = -4x - 14