41. 42. 43. 44. 45. 46. 47. 48. 68 24 55 41 72 12 13 46 49. (143)(17) 50. (722)(28) 51. (349)(19) 52. (512)(31) 53. 54. 55. 56. 57. 58. 59. 60. Concept 4: Estimating Products by Rounding For Exercises 61–68, multiply the numbers, using the method found on page 44. (See Example 7.) 61. 62. 63. 64. 65. 66. 67. 68. For Exercises 69–72, estimate the product by first rounding the number to the indicated place value. 69. 11,784 5201; thousands place 70. 45,046 7812; thousands place 71. 82,941 29,740; ten-thousands place 72. 630,229 71,907; ten-thousands place 73. Suppose a hotel room costs $189 per night. Round this number to the nearest hundred to estimate the cost for a five-night stay. (See Example 8.) 74. The science department of Comstock High School must purchase a set of calculators for a class. If the cost of one calculator is $129, estimate the cost of 28 calculators by rounding the numbers to the tens place. 75. The average price for a ticket to see Kenny Chesney is $272. If a concert stadium seats 10,256 fans, estimate the amount of money received during that performance by rounding the number of seats to the nearest ten-thousand. 76. A breakfast buffet at a local restaurant serves 48 people. Estimate the maximum revenue for one week (7 days) if the price of a breakfast is $12. 50,000 6000 90,000 400 1000 2000 8000 9000 4000 400 3000 700 900 50 600 40 7026 528 4122 982 2810 1039 3532 6014 387 506 222 841 703 146 151 127 41 21 32 14 51,006 8 42,014 9 Section 1.5 Multiplication of Whole Numbers and Area 49 Concept 5: Translations and Applications Involving Multiplication 77. The 4-gigabyte (4-GB) iPod nano is advertised to store approximately 1000 songs. Assuming the average length of a song is 4 minutes, how many minutes of music can be stored on the iPod nano? (See Example 9.) 78. One CD can hold 700 megabytes (MB) of data. How many megabytes can 15 CDs hold? 79. It costs about $45 for a cat to have a medical exam. If a humane society has 37 cats, find the cost of medical exams for their cats. 80. A can of Coke contains 12 fluid ounces (fl oz). Find the number of ounces in a case of Coke containing 12 cans.
miller_basic_college_math_3e_ch1_3
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