Tech I- Chapter 6 Test

1. Find the unit rate for number of parts manufactured per hour if 584 parts are made in 5 hours. Round to the nearest integer.a. 162 parts/h b. 117 parts/h c. 76 parts/h d. 138 parts/h

2. A 32-oz bottle of water costs $1.60. What is the cost per ounce?a. $0.05/oz b. $0.64/oz c. $0.50/oz d. $6.40/oz

3. Find the unit rate for number of parts manufactured per hour if 1505 parts are made in 3 hours. Round to the nearest integer.a. 502 parts/h b. 525 parts/h c. 551 parts/h d. 472 parts/h

4. A 24-oz bottle of water costs $1.68. What is the cost per ounce?a. $0.07/oz b. $0.34/oz c. $0.70/oz d. $3.43/oz

Solve the proportion.

5.

a. 32.7 b. 6 c. 98 d. 1.5

6.

a. –4.5 b. –18 c. –27 d. –2

7.

a. –1.8 b. –5 c. –18 d. –20

8.

a. –14.2 b. –20.4 c. –85 d. –1.8

9.

a. 127

b. 1 c. 11 d. 59

10.

a. 4 b. 214

c. 14

d. 23

7

11.

a. 133

b. 83

c. 383

d. 232

12.

a. 348 b. 2.1 c. 69.6 d. 12.1

13.

a. 35 b. 169

c. 4918

d. 259

14.

a. 2537

b. 24119

c. 7919

d. 7019

15.

a. 17 b. 297

c. 1914

d. 87

16.

a. 18 b. 1

5c. 17

10d. 9

5

17.

a. 1909

b. 17011

c. 13011

d. 12611

The pair of figures is similar. Find x. Round to the nearest tenth if necessary.

18.

Drawing not to scale

27 cm

39 cm

17 cmx

a. 11.8 cm b. 20.4 cm c. 24.6 cm d. 29 cm

19.

Drawing not to scale

17 cm

22 cm

11 cmx

a. 8.5 cm b. 12.3 cm c. 14.2 cm d. 16 cm

20.8 ft

7 ft

x

3 ft

Drawing not to scale

a. 3.4 ft b. 2.6 ft c. 0.4 ft d. 2.3 ft

21.19 ft

10 ft

x

3 ft

Drawing not to scale

a. 5.7 ft b. 1.6 ft c. 0.2 ft d. 3.3 ft

22. A tree casts a shadow 12 ft long. A boy standing next to the tree casts a shadow 3.5 ft. long. If the boy is 6 ft. tall, how tall is the tree?

a. 18 ft b. 12.5 ft c. 15 ft d. 20 ft

23. A building casts a shadow 25 ft long. A girl standing next to the tree casts a shadow 3.2 ft. long. If the girl is 5.6 ft. tall, how tall is the building?

a. 18 ft b. 12.5 ft c. 15 ft d. 20 ft

24. What percent of 15 is 9?a. 16.7% b. 6% c. 60% d. 33%

25. What percent of 105 is 70?a. b. c. 50% d. 70%

26. 60% of 60 is what number?a. 18 b. 4 c. 36 d. 9

27. What is 20% of 94?a. 15.98 b. 21.62 c. 18.8 d. 19.74

28. 25% of what number is 21?a. 140 b. 60 c. 84 d. 8

29. What is 51% of 44? Estimate the answer.a. 22 b. 18 c. 31 d. 26

30. What is 150% of 40?a. 6 b. 60 c. 20 d. 600

31. What is 0.25% of 600?a. 1.5 b. 3 c. 6 d. 15

32. The circulation of a magazine decreased from 5000 to 3350. Find the percent of decrease in circulation.a. 33% b. 149% c. 7% d. 49%

33. Find the percent of change in altitude if an airplane moves from 150 ft to 87 ft. Describe the percent of change as an increase or decrease. a. 35.7%; decrease c. 42%; decreaseb. 85.4%; increase d. 42%; increase

34. During the month of February, Walmart sold 50 pairs of red loafers. After an ad campaign to boost sales, they sold 55 pairs in March. Find the percent of increase in sales.a. 6% b. 10% c. 8% d. 12%

35. The cost of a newsletter decreased from 5800 to 3730. Find the percent of decrease in cost to the nearest percent.a. 55% b. 36% c. 155% d. 6%

36. Find the percent of change in altitude if a weather balloon moves from 175 ft to 126 ft. Describe the percent of change as an increase or decrease. Round to the nearest tenth if necessary.a. 45.9%; increase c. 28%; decreaseb. 23.8%; decrease d. 28%; increase