2 Calculate the simple interest earned. Round to the nearest cent.

P = $3700, r = 5.3%, t = 6 months

4 Calculate the maturity value of a simple interest, one-year loan of $5200. The interest rate is 11.8%. (Round your answer to two decimal places.)

8 Use a calculator for this exercise. Chuong Ngo borrows $5400 from a bank that advertises a 6% simple interest rate and repays the loan in six equal monthly payments. Estimate the APR. Round to the nearest tenth of a percent. Use the Approximate Annual Percentage Rate Formula.

9 Use a calculator for this exercise. Arrowood's Camera Store advertises a Canon Power Shot 3.34-megapixel camera for $425, including taxes. If you finance the purchase of this camera for 1 year at an annual percentage rate of 6.3%, find the monthly payment. (Round your answer to the nearest cent.)

10 Jeffery Wei received a 6-year non-subsidized student loan of $32,000 at an annual interest rate of 5.2%. What are Jeffery's monthly loan payments for this loan after he graduates in 4 years? (Round your answer to the nearest cent.)

20 You purchase a cottage for $185,000. You obtain a 25-year, fixed rate mortgage loan at 13.0% after paying a down payment of 20%. Of the second month's mortgage payment, how much is interest and how much is applied to the principal? (Round your answers to the nearest cent.)

21 Suppose you obtain a 30-year mortgage loan of $195,000 at an annual interest rate of 8.2%. The annual property tax bill is $979 and the annual fire insurance premium is $492. Find the total monthly payment for the mortgage, property tax, and fire insurance. (Round your answer to the nearest cent.)

25 After six biology tests, Ruben has a mean score of 77. What score does Ruben need on the next test to raise his average (mean) to 79?

28 Find the standard deviation, and the variance for the given samples. Round non-integer results to the nearest tenth.56, 79, 52, 89, 74, 78, 47, 97, 50

29 A customer at a specialty coffee shop observed the amount of time, in minutes, that each of 20 customers spent waiting to receive an order. The results are recorded in the table below.

3.2	4.0	3.7	2.4	4.8	5.0	4.6	3.5	3.4	6.2
3.6	4.8	4.4	5.0	2.9	3.4	2.3	4.0	5.2	3.0

Find the sample standard deviation of these data. Round to the nearest hundredth.

30 A survey of 10 fast-food restaurants noted the number of calories in a mid-sized hamburger. The results are given in the table below.

515

506

503

497

495

505

457

477

462

513

Find the sample standard deviation of these data. Round to the nearest hundredth.

31 A survey of 16 energy drinks noted the caffeine concentration of each drink in milligrams per ounce. The results are given in the table below.

9.1	9.1	7.4	7.6	7.7	8.8	8.8	8.8
8.9	8.9	8.3	9.1	9.1	8.2	8.7	8.9

Find the sample standard deviation of these data. Round to the nearest hundredth.

33 Round eachz-score to the nearest hundredth. A data set has a mean of x=4050 and a standard deviation of119. Find thez-score for each of the following.

(a) x= 3840 (b) x= 4200 (c) x= 4300 (d) x= 4030