Divide and write answer in lowest terms.
÷ 
A. 
B. 1
C. 
D. 2
Answer: D
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Use the rules for exponents to rewrite the expression and then evaluate the new expression. (72)-1
A. 
B. - 
C. -14
D. -49
Perform the indicated operation. Write the answer in scientific notation.
A. 2.19 × 1040 B. 1.25 × 10-44 C. 2.19 × 10-4 D. 1.25 × 10-2
Provide an appropriate response.A student wanted to estimate 21.5 × 0.0079 by first rounding each number. He solved the problem as follows.21.5 × 0.0079 is approximately equal to 
which is equal to 0.016. So he estimated the answer as 0.016. Do you agree with the answer? If not, explain where the student went wrong and give the correct answer.
What will be an ideal response?
Simplify the expression using order of operations.(0.9)2 + (0.7)2 + 0.6
A. 3.8 B. 3.16 C. 1.9 D. 7