Solve the problem. Express your answer in scientific notation, and round to one decimal place. The mass of an electron is approximately 9.11 × 10-28 grams. Find the mass of 813,000,000 electrons.
A. 7.4 × 10-17 grams
B. 7.4 × 10-19 grams
C. 7.4 × 10-20 grams
D. 7.4 × 10-18 grams
Answer: B
Mathematics
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Subtract.
A. 962 B. 862 C. 956 D. 988
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+ 17
A. -37 B. 3 C. 37 D. -3
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Find the LCD. Do not combine fractions.
, 
A. x(x + 1)(x + 4) B. x(x + 4) C. (x + 4)2 D. x(x + 4)2
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Evaluate the exponential expression.-0.82
A. -0.64 B. 1.92 C. 0.64 D. -1.6
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