Answer:
The surface area of a cylinder with radius "r" and height "h" is given by: 2πrh + 2πr^2.
So, for the given cylinder, the surface area can be calculated as:
surface area = 2 * π * 3^2 * 7 + 2 * π * 3 * 7
= 2 * π * 9 * 7 + 2 * π * 3 * 7
= 126π + 42π
= 168π
Rounding the answer to the nearest tenth, the surface area of the cylinder is approximately 527.1 square feet.