Dave invests $300 in an account with a 5% interest rate. If he makes no
other deposits or withdraw als, find his account balance after 15 years
if the interest is compounded with the following frequencies.
a) semiannually
b) monthly

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?