21

3

Warm-Up 21-1 NS 1.3 , 1.6, 1.7

2

1

3

Warm-Up 21-2 NS 1.3 , 1.6, 1.7

2

1

Warm-Up 21-3 NS 1.3 , 1.6, 1.7

3

Warm-Up 21-4 NS 1.3 , 1.6, 1.7

12

3

1 2

3

Warm-Up 21-5 NS 1.3 , 1.6, 1.7

1Warm-Up 22-1 NS 1.3 , 1.6, 1.7

2

3

Warm-Up 22-2 NS 1.3 , 1.6, 1.7

1 2

3

Dave decided to take a $11,000 loan for a used car. His father offered him a simple interest loan at 12% for 2 years. What total amount will Dave repay at the end of two years? A. $13, 798.00B. $13,640.00C. $2,640.00D. $1478.40

1 2

3

Warm-Up 22-3 NS 1.3 , 1.6, 1.7

Warm-Up 22-4 NS 1.3 , 1.6, 1.7

1 2

3

Warm-Up 22-5 NS 1.3 , 1.6, 1.7

12

3Gilbert borrowed $200 from his mom. He promised to pay it back in one year at a simple interest rate of 10% per year. What total amount will Gilbert have to pay back at the end of the year? A . $20B. $210C. $190D. $220

Warm-Up 23-1 NS 1.3 , 1.6, 1.7

1

Roberta invested $5000 in the stock market. After 6 months, the value dropped to $3750. Find the percent of decrease in the value of her investment.A. 37.50%B. 25%C. 23%D. 12%

Three years ago, Lily deposited $200 in a bank account that earns 4% simple interest annually. She has made no other deposits or withdrawals. What total amount is in the account now?A. $240B. $208C. $224D. $212

3

2

Warm-Up 23-2 NS 1.3 , 1.6, 1.7

2A sales associate makes $2500 per month plus commission. One month she sold one sailboat for $38,000, earning a 3% commission. What was her total pay?

A. $114 B. $1140

C. $2614 D. $3640

1

3

Warm-Up 23-3 NS 1.3 , 1.6, 1.7Three years ago, Melissa deposited $750 into a saving account that earned 6% simple interest. If she makes no other deposits or withdrawals, how much interest did the account earn at the end of 3 years? A. $135B. $250C. $45D. $1,350

In 1990 there were 639,270 robberies reported in the US. This number decreased in 2002 to 420,637. What was the percent of decrease?

A. 63.9%

B. 34.2%

C. 38.6%

D. 102%

12

3

Warm-Up 23-4 NS 1.3 , 1.6, 1.7

The Lincoln School Booster Club makes a profit of 20% on all sales of bill caps. During one season the total sales on caps were $2625. How much was the profit?

A. $4.75B. $99.75C. $142. 50D. $47.50

12

A refrigerator usually sells for $879 goes on sale for $649. Find the percent of decrease, to the nearest tenth of a percent.

A. 12.2% B. 26.2%

C. 35.4% D. 173.8%

3

Warm-Up 23-5 NS 1.3 , 1.6, 1.7

Marlys borrowed $200 at 12% simple interest for 1 year. If she makes no payments that year, how much interest will she owe at the end of the year? A. $6.00B. $12.00C. $22.40D. $24.00

1

2

3

Warm-Up 24-1 NS 1.3 , 1.6, 1.7

31Sam invested $2500 for 2 years in a savings account. The account paid an annual simple interest rate of 2.5%. How much interest did Sam earn during the 2 years? A. $62.50B. $125C. $1250D. $2625

2

Warm-Up 24-2 NS 1.3 , 1.6, 1.7

1 Miguel wants to purchase a

$25 DVD with his 25% discount coupon. Find the total cost of the DVD when sales tax is 9.25%.

A. $15.00 B. $17.01

C. $27.31 D. $22.30

2

3

Warm-Up 24-3 NS 1.3 , 1.6, 1.7

1

Toni invested $250 in an account for 4 years. The total interest earned on the investment was $125. What was the interest rate on the account? A. 3.125%B. 12.5%C. 125%D. 1125%

3 A can of soup had 480 mg of sodium per serving. The sodium was reduced to 360 mg. Find the percent of decrease in sodium.

A. 25% B. 33%

C. 75% D. 175% 2

Warm-Up 24-4 NS 1.3 , 1.6, 1.7

Dena borrowed $7500 to buy a used car. The bank charged her 9% simple interest per year. She paid $2025 in interest. Find the amount of time she borrowed the money.

A. 2.5 years B. 4 years

C. 5 years D. 3 years 1

2 3

Warm-Up 24-5 NS 1.3 , 1.6, 1.7

Toni invested $640 in an account for an annual rate of 3.5%. The total interest earned on the investment was $125. What was the interest rate on the account? A. 3.2 yearsB. 2.5 yearsC. 4 yearsD. 5.75 years

2

1

The bill at a restaurant comes to $45.90 for you and four friends. You leave a tip of 20%. What is the cost of the meal?

A. $55.08 B. $36.72

C. $9.18 D. $47.90

3