Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.Assume that the volume of the earth is 5 × 1014 cubic meters and the volume of a bacterium is 
cubic meters. If the earth could be filled with bacteria, how many would it contain?
A. 2.0 × 1030 bacteria
B. 5.0 × 10-31 bacteria
C. 5.0 × 1031 bacteria
D. 2.0 × 10-30 bacteria
Answer: A
Mathematics
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Graph the circle with radius r and center (h, k).r = 4; (h, k) = (4, 0) 
A. 
B. 
C. 
D. 
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Estimate the sum or difference by first rounding to the nearest ten.74
A. 140 B. 130 C. 100 D. 136
Mathematics
Solve.(x - 7)(x + 1) ? 0
A. (7, ?) B. (-?, -7] ? [1, ?) C. (7, -1) D. (-?, -1] ? [7, ?)
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Rewrite as the sum of two or more logarithms using the product rule for logarithms. Assume all variables represent positive real numbers.logx (8yz)
A. logx (8 + y + z) B. (logx 8)(logx y)(logx z) C. log8 y + log8 z D. logx 8 + logx y + logx z
Mathematics