Health Plan The manager of an employee health plan for a firm has studied the balance B, in millions of dollars, in the plan account as a function of t, the number of years since the plan was instituted. He has determined that the account balance is given by the formula
a. Make a graph of B versus t over the first 7 years of the plan.
b. At what time is the account balance at its maximum?
c. What is the smallest value of the account balance over the first 7 years of the plan?
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