Section 1.4 Rounding and Estimating 37 Concept 2: Estimation For Exercises 33–36, estimate the sum by first rounding each number to the nearest ten. (See Example 5.) 33. 34. 35. 36. 29 73 113 41 12 129 33 78 41 57 82 21 For Exercises 37–40, estimate the difference by first rounding each number to the nearest hundred. (See Example 6.) 37. 38. 731 39. 40. 584 898 422 Concept 3: Using Estimation in Applications For Exercises 41 and 42, refer to the table. 9771 4544 3412 1252 Brand Manufacturer Sales ($) M&Ms Mars 97,404,576 Hershey’s Milk Chocolate Hershey Chocolate 81,296,784 Reese’s Peanut Butter Cups Hershey Chocolate 54,391,268 Snickers Mars 53,695,428 KitKat Hershey Chocolate 38,168,580 41. Round the sales to the nearest million to 42. Round the sales to the nearest million to estimate the total sales brought in by the estimate the total sales brought in by the Mars company. (See Example 7.) Hershey Chocolate Company. 43. Neil Diamond earned $71,339,710 in U.S. tours in one year while Paul McCartney earned $59,684,076. Round each value to the nearest million dollars to estimate how much more Neil Diamond earned. (See Example 8.) 44. The average annual salary for a public school teacher in Iowa is $43,130. The average salary for a public school teacher in California is $63,640. Round each value to the nearest thousand to estimate how much more a school teacher in California makes compared to one from Iowa. For Exercises 45–48, use the given table. 45. Round the revenue to the nearest hundredthousand to estimate the total revenue for the years 1 through 3. 46. Round the revenue to the nearest hundredthousand to estimate the total revenue for the years 4 through 6. 47. a. Determine the year with the greatest revenue. Round this revenue to the nearest hundred-thousand. Beach Parking Revenue for Daytona Beach, Florida Year Revenue 1 $3,316,897 2 3,272,028 3 3,360,289 4 3,470,295 5 3,173,050 6 1,970,380 Source: Daytona Beach News Journal Table for Exercises 45–48 b. Determine the year with the least revenue. Round this revenue to the nearest hundred-thousand. 48. Estimate the difference between the year with the greatest revenue and the year with the least revenue.
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