Rewrite each number using scientific notation before performing the operation. Leave your answer in scientific notation form.(80,000)(900)

A. 7.2 × 109
B. 7.2 × 106 
C. 7.2 × 107 
D. 7.2 × 108


Answer: C

Mathematics

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A. ?
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D.

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Simplify the expression involving rational exponents.- 1/2

A. Not a real number
B. - 
C.
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The graph of a function f is given. Use the graph to answer the question.Is f(20) positive or negative?

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