1. Salary: Your weekly salary increases from $440 to $506. What percent is your raise?
2. Discount Rate: The price of a shirt has been discounted by $20. The sale price is $29.95. What percent of the original list price is the discount?
3. Weekly Paycheck: Your weekly paycheck is 12% more than your coworker's. Your two paychecks total $848. Find the amount of each paycheck.
4. Complete the following to find the balance A for P dollars invested at rate r for t years, compounded n times per year.

a. If P = $5,000, r = 8%, t = 5 years

n = 1, A = ?

n = 2, A = ?

n = 4, A = ?

n = 12, A = ?

n = 365, A = ?

n = Continuous, A = ?

b. If P = $2,500, r = 5%, t = 20 years

n = 1, A = ?

n = 2, A = ?

n = 4, A = ?

n = 12, A = ?

n = 365, A = ?

n = Continuous, A = ?

5. Find the present value of amount A invested at rate r for t years, compounded n times per year.

A = $20,000, r = 8%, t = 6 years, n = 4

The present value formula: P = A (1+ r/n) ^ -nt is obtained by solving the compound interest formula: A = P (1 + r/n) ^ nt