Perform the indicated operation and express the answer in decimal notation.(4 × 108)(5 × 10-6)

A. 0.2
B. 2000
C. 20,000,000,000,000,000
D. 4000


Answer: B

Mathematics

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C. 5
D. 18

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What will be an ideal response?

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Solve the problem.Mara can type 51 words per minute. How many words would she type in  hour (15 minutes)?

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