Chapter 6.4, Problem 2E

Reminder Round all answers to two decimal places unless otherwise indicated.

Wendy’s According to a report in The Wall Street Journal, Wendy’s revenue fell $3.2\%$ to $\$489.5\text{million}$ in the second quarter of $2015$. That represents a quarterly decay rate, as a decimal of $e^{-0.0325}$. Let $R\left(t\right)$ denote Wendy’s revenue, in millions of dollars, $t$ quarters after the second quarter of $2015$. Suppose that revenue continues to fall at this same rate.

a. Write the equation of change for Wendy’s revenue.

b. Find a formula that gives Wendy’s revenue $t$ quarters after the second quarter of $2015$.