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Key Concepts Quiz 3.2
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Use the document below to help answer the questions:


1
Write as a power: 7 × 7 × 7 × 7 × 7
A)77
B)75
C)57
D)55
2
Write as a repeated multiplication: 65
A)5 × 5 × 5 × 5 × 5
B)5 × 5 × 5 × 5 × 5 × 5
C)6 × 6 × 6 × 6 × 6
D)6 × 6 × 6 × 6 × 6 × 6
3
Consider the power 45. Identify the identical factor, and how many factors there are.
A)The identical factor is 4, and the number of factors is 4.
B)The identical factor is 4, and the number of factors is 5.
C)The identical factor is 5, and the number of factors is 4.
D)The identical factor is 5, and the number of factors is 5.
4
Write a power that has an identical factor of 12 and 8 factors.
A)128
B)1212
C)88
D)812
5
Evaluate the expression (34 – 43).
A)5184
B)145
C)24
D)17
6
Evaluate the expression (x3 – y3) for x = 1 and y = – 1.
A)9
B)6
C)2
D)0
7
The current population of the Earth is about 6 billion people. The population grows by about 1.4% per year. It is estimated that the Earth can support a maximum population of about 25 billion people. Use your calculator to determine how many years it will take to pass 25 billion.
A)103 years
B)52 years
C)26 years
D)12 years





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