Review Exercises 91 For Exercises 65–68, use the properties of division to simplify the expression, if possible. 65. 3 1 66. 3 3 67. 68. 3 0 0 3 69. Explain how you check a division problem if there is no remainder. 70. Explain how you check a division problem if there is a remainder. For Exercises 71–73, divide and check the answer. 71. 72. 73. 1043 20 348 6 11458 For Exercises 74 and 75, write the English phrase as a mathematical expression and simplify. 74. The quotient of 72 and 4 75. 108 divided by 9 76. Quinita has 105 photographs that she wants to divide equally among herself and three siblings. How many photos will each person receive? How many photos will be left over? 77. Ashley has $60 to spend on souvenirs at a surf shop.The prices of several souvenirs are given in the graph. For Exercises 80–83, evaluate the exponential expressions. 80. 53 81. 44 17 106 82. 83. For Exercises 84 and 85, evaluate the square roots. 84. 85. 164 2144 For Exercises 86–91, evaluate the expression using the order of operations. 86. 87. 88. 89. 90. 91. 14 7 4 1 102 52 90 4 6 3 2 2 3 12 2 225 62 42 19 723 26 2110 12 13 4 112 92. Find the mean (average) for the set of numbers 7, 6, 12, 5, 7, 6, 13. 93. Carolyn’s electric bills for the past 5 months have been $80, $78, $101, $92, and $94. Find her average monthly charge. 94. The table shows the number of homes sold by a realty company in the last 6 months. Determine the average number of houses sold per month for these 6 months. Price of Souvenirs Price ($) 20 15 10 5 0 15 8 12 10 T-shirts Key Chain Hat Poster a. How many souvenirs can Ashley buy if she chooses all T-shirts? b. How many souvenirs can Ashley buy if she chooses all hats? Section 1.7 For Exercises 78 and 79, write the repeated multiplication in exponential form. Do not simplify. 78. 8 8 8 8 8 79. 2 2 2 2 5 5 5 Number of Month Houses May 6 June 9 July 11 August 13 September 5 October 4
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