Powers And Roots Worksheet With Answers Page 11
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18Name: ________________________
ID: A
−3
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−8
−2
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71. Simplify
4
7
2
2
−
4
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⋅ −
72. Evaluate
.
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73. The number 3689_ has a missing last digit. Determine the smallest digit so that the 5 digit number is divisible
by 4.
74. Which of these numbers is not a perfect square: 16, 17, 49, or 81?
−3
−8
−5
−4a
b
c
. Write using powers with positive exponents.
75. Simplify
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−3
−3
16a
b
c
Problem
76. Is the cube root of 40 rational or irrational?
Use 2 different strategies to justify your answer.
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