Minanisishioma I’m not sure
Answer:
where is the picture? or number line
In the equation for surface area the radius is squared ( r^2)
If the radius is doubled, the radius would be 2^2 more which equals 4
The surface area would be 4 times the old surface area.

It is prime because it has no common factors in 5a^2 and b.
The answer is
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Can you possibly take a clearer picture? Maybe I can help you with that.