Evaluate the expression xy for the given values of the variables.x = 0.4, y = -18.1
A. -7.24
B. 7.24
C. -18.5
D. -17.7
Answer: A
Mathematics
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Solve the problem.In an economics study, three quantities m, p, and q have been found to be related by the equation m = p1/2 ? q1/2. Find m, if p = 25 and q = 36.
A. 30 B. 11 C. 900 D. 180
Mathematics
Divide.-100 ÷ 4
A. 25
B. -35
C. -25
D. - 
Mathematics
Multiply.7 ? (-5) ? 12 ? (-13)
A. -407 B. -5,460 C. 5,460 D. 1
Mathematics
Find the value of (f ? g)' at the given value of x.Assume that f'(3) = 6 , g'(4) = -5, g(4) = 3, and y = f(x). What is y' at x = 4?
A. 18 B. -25 C. 6 D. -30
Mathematics