Perform the indicated operation. Write the answer in scientific notation.(2.1 × 108)(3.9 × 10-15)
A. 8.19 × 10-7
B. 8.19 × 107
C. 8.29 × 10-7
D. 8.29 × 10-23
Answer: A
Mathematics
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Provide an appropriate response.Perform the indicated operations. Write answer in scientific notation: (3.8 × 104)(4.2 × 105)
What will be an ideal response?
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A. 
B. 
C. 
D. 
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A. (x + 15)(x - 1) B. (x - 5)(x + 3) C. (x + 5)(x - 3) D. prime
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