CPM Homework Help : INT2 Problem 11-80

As Shannon peels her orange for lunch, she realizes that it is very close to being a sphere. If her orange has a diameter of $8$ centimeters, what is its approximate surface area (the area of the orange peel)? What is the approximate volume of the orange? Show all work.

Hint:

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

$\text{ V}=\frac{4}{3}\pi(r)^{3}$

Answer:

$\text{ SA}=4\pi(4)^{2}=64\pi\approx201\;\text{cm}^{2}$

$\text{V}=\frac{4}{3}\pi(4)^3=\frac{256}{3}\pi\approx268\text{ cm}^2$