Perform the indicated calculation. Express your answer using scientific notation.(15.64 × 103) ÷ (4 × 10-5)
A. 7.82 × 108
B. 7.82 × 10-2
C. 3.91 × 10-2
D. 3.91 × 108
Answer: D
Mathematics
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A. Slope undefined; y-intercept (7, 0) B. Slope undefined; y-intercept (0, 7) C. Slope 0; y-intercept (0, 7) D. Slope 0; y-intercept (7, 0)
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Find the largest open intervals where the function is concave upward.f(x) = x4 - 8x2 (exact values)
A. 
, 
B. 
C. 
D. None
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Rationalize the denominator. Assume that all variables represent non-negative real numbers. Make sure you simplify the final answer.
A. 
B. 
C. 
D. 
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Use the distributive property to write the expression without parentheses. Then simplify, if necessary.2(5x + 4 + y)
A. 10x + 4 + 2y B. 10x + 8 + y C. 10x + 4 + y D. 10x + 8 + 2y
Mathematics