Name:    Quiz 6.5-6.7

Multiple Choice
Identify the choice that best completes the statement or answers the question.

1.

A bike with an original price of \$90 is discounted 40%. What is the sale price?
 a. \$36 c. \$126 b. \$50 d. \$54

2.

A gold chain with an original price of \$120 is on sale for \$96. What is the percent of the discount?
 a. 125% c. 24% b. 80% d. 20%

3.

A remote control airplane with an original price of \$85 is on sale for \$76.50. What is the percent of the discount?
 a. 8.5% c. 10% b. 111% d. 90%

Find the annual interest rate.

4.

I = \$40, P = \$500, t = 16 months
 a. 8% c. 5% b. 6% d. 0.06%

Find the amount of time.

5.

I = \$10, P = \$100, r = 2%
 a. 3 years c. 5 years b. 0.1 year d. 4 years

6.

A savings account earns 4% annual simple interest. The principal is \$1100. What is the balance after 5 years?
 a. \$23,100 c. \$1320 b. \$220 d. \$22,000

Numeric Response

1.

A dog shelter had 20 puppies last month. This month, 31 puppies are at the shelter. What is the percent of change?

2.

A pair of boots with an original price of \$34.70 is discounted 10%. What is the sale price?

3.

A television with an original price of \$120 is on sale for \$90. What is the percent of the discount?

4.

After 4 years at 3% simple interest per year, your savings account earns \$90.00. What is the principal?

5.

A principal of \$19,500 is invested at 6% annual simple interest for 9 years. How much interest is earned?

Identify the percent of change as an increase or decrease. Then find the percent of change. Round to the nearest tenth of a percent, if necessary.

1.

15 grams to 30 grams

2.

50 feet to 9 feet