Section MU.1 – Solutions to the Practice Problems

1. 10 pounds

2. $9,020.00

3.

a. $7,285.71
b. $437,142.86

4. 89 mg (milligrams)

5. $2,009.26

6. 8 mi (miles)

7.

Rate: [latex]\frac{540~ft}{30~sec}[/latex]

Unit Rate: [latex]\frac{18~ft}{1~sec}[/latex] = 18 feet per second

8. $70.00

9.

a. 863.64 mi
b. 37.63 gal (gallons)

10. 74 turbines

11. 2,667 dump truck loads

12. $3,313.92

13. 74 min (minutes)

14.

a. 2,480 cal (calories)
b. 310 cal

15. Proportion is not true

16. x = 9

17. 98.33

18. Yes, the miles are proportional to the hours.

19. No, the hours are not proportional to the miles traveled.

20. Yes, the number of snacks are proportional to the calories consumed.

21. No, the number of snacks are not proportional to the calories consumed.

22. 15-oz is the better buy, 80.1 people per square mile or [latex]\frac{people}{mi^2}[/latex]