ASSIGNMENT
27. Extended Problem Solving. The pizzas you order for home delivery cost $19. The sales tax is 4.9%, and you plan to give a 15% tip.
a. Estimate Estimate the amount of the sales tax.
b. Estimate Use mental math to estimate a 15% tip. Explain the method of estimation you use.
c. Interpret Estimate the total cost of the order. Is your estimate a high estimate or a low estimate of the total cost? Explain.
d. Find the exact total cost of the order. How close was your estimate?
28. A store marks up the wholesale price of an item by 60%. A month later the store puts the item on sale. If the store doesn’t want to lose money on the item, what is the maximum discount percent the store can use?
Give the place and value of the red digit. Then round the number to that place. (p. 770)
29. 93.21
30. 341.073
31. 1595.962
32. 17,024.981
Evaluate the expression when x = 5, y = 7, and z = 10. (Lesson 1.3) 33. xyz 34. x(3z + y) 35. x(5 + yz) 36. xz – xy
Write the percent as a decimal. (Lesson 7.3)
37. 45%
38. RE%
39. 102%
40. 0.4%
