Solve the problem.A force acts on a certain object in such a way that when the object has moved a distance of r (in m), the force f (in newtons) is given by f = 8r2 + 9r. Find the work (in joules) done through the first four meters by evaluating 
A. 242.7 J
B. 40 J
C. 179.7 J
D. 64 J
Answer: A
Mathematics
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Find the interval of convergence of the series.
A. x < 5 B. 3 ? x < 5 C. -? < x < ? D. 3 < x < 5
Mathematics
Evaluate the logarithm.log
A. 1
B. -1
C. - 
D. -2
Mathematics
Write a variation equation in the given variables.Let f(L) be the width (in feet) of a rectangle with an area of 8 square feet and a length of L (in feet).
A. f(L) = 8 + L
B. f(L) = 
C. f(L) = 
D. f(L) = 8L
Mathematics
Simplify the expression.8x + (10x + 1)
A. 18x + 1 B. 80x C. 18x2 + 1 D. 36x
Mathematics