find the surface area of this sphere. sphere formulas sa = 4πr² v = 4/3πr³ sa = ?π ft²

Answer:

$64$

Explanation:

Step1: Identify the radius

$r = 4$ ft

Step2: Apply the surface - area formula

$SA=4\pi r^{2}=4\pi\times4^{2}$

Step3: Calculate the result

$4\pi\times16 = 64\pi$ ft², and the number in the blank for $SA=[?]\pi$ is $64$.