A park has a circular goldfish pond. The area of the surface of the pond can be found by using this formula. A=πr2
What is the area, A, of the surface of the pond if its radius, r, is 5 feet? (Use 3.14 for π.)
A. 78.5 square feet
B. 31.4 square feet
C 15.7 square feet
D. 10.14 square feet

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?