Question

find the surface area of this sphere.

sphere formulas
\\(sa = 4\pi r^2\\)
\\(v = \frac{4}{3}\pi r^3\\)

\\(sa = ? \pi\text{ ft}^2\\)

Explanation:

Identify the given radius

$$ r = 4\text{ ft} $$

Apply the surface area formula

$$ \text{SA} = 4\pi r^2 = 4\pi (4)^2 $$

Calculate the final coefficient

$$ \text{SA} = 4\pi (16) = 64\pi\text{ ft}^2 $$

Answer:

Find the surface area of this sphere.

\(\text{SA} =\) <blank>64</blank> \(\pi\text{ ft}^2\)