Use front-end rounding to estimate the difference:
?
?
A. 42,000
B. 52,000
C. 53,000
D. 43,000
Answer: B
Mathematics
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A. 28x8y16
B. 216x8y32
C. 28x8y16
D. 28x8y16
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Find an expression for dy/dx.y = (u + 7)(u - 7) and u = x2 + 6
A. 2(x2 + 6) + 2x B. 4x(x2 + 6)2 C. 2(x2 + 6) D. 4x(x2 + 6)
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Solve the problem.The area A(r) = ?r2 of a circular oil spill changes with the radius. At what rate does the area change with respect to the radius when 
A. 20 ft2/ft B. 20? ft2/ft C. 100? ft2/ft D. 10? ft2/ft
Mathematics