Question

find the surface area of this sphere.
sphere formulas
sa = 4πr²
v = \\(\frac{4}{3}\\)πr³
(the sphere has a radius r of 11 in)
sa = ?π in²

Explanation:

Step1: Identify the radius

The radius \( r \) of the sphere is given as 11 inches.

Step2: Use the surface area formula for a sphere

The formula for the surface area (SA) of a sphere is \( SA = 4\pi r^2 \). Substitute \( r = 11 \) into the formula:
\( SA = 4\pi(11)^2 \)

Step3: Calculate \( (11)^2 \) and multiply by 4

First, \( 11^2 = 121 \). Then, \( 4\times121 = 484 \). So, \( SA = 484\pi \) square inches.

Answer:

484