Answer:
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Step-by-step explanation:
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The area of a sphere: A = 4.π.R²
A= 5541.77 → 5541.77 = 4.π.R²
R² = (5541.77)/(4.π)
R² = 441; → R =√441; R = 21 cm
If 14 out of 20 is correct, then that is : 14/20 = 0.70 = 70%
4 +5 = 9 and 12 + 3 =15 and there is more than this
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