standard_description: Derive the formula for the sum of a finite geometric series (when the common ratio is not 1), and use the formula to solve problems. For example, calculate mortgage payments.
problem_activity: Gino’s rectangular backyard is 80 feet by 65 feet. Denae’s rectangular backyard is 85 feet by 60 feet.
a.   Whose backyard has a greater area? By how much?
b.   Whose backyard has a larger perimeter? By how much?


aligns: no