Solve the problem.A company's cost for operating two warehouses is C(x, y) = 4x3y dollars, where x is the number of units in warehouse A and y is the number in B. Find the average cost to store a unit if A has 1 to 2 units, and B has 3 to 5 units.
A. $150
B. $60
C. $90
D. $120
Answer: B
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Solve the problem.A rock falls from a tower that is 117.6 m high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground 
Round to the nearest tenth, if necessary.
A. 10.8 sec B. 10.6 sec C. 4.9 sec D. 2822.4 sec
Decide whether or not the functions are inverses of each other.f(x) = 9x - 8, g(x) = 
A. Yes B. No
Find the complete factored form of the polynomial f(x) that satisfies the given conditions.Degree 4, leading coefficient -5, zeros at -8, 5, 6i, and -6i
A. f(x) = -5(x + 8)(x - 5)(x + 6i)(x - 6i) B. f(x) = -5(x - 8)(x + 5)(x2 + 36) C. f(x) = -5(x + 8)(x - 5)(x2 + 36) D. f(x) = -5(x - 8)(x + 5)(x + 6i)(x - 6i)
A truck gets 600/x mpg when driven at a constant speed of x mph (between 40 and 80 mph). If the price of fuel is $1/gallon and the driver is paid $8/hour, at what speed between 40 and 80 mph is it most economical to drive? ?
A. 60 mph B. 80 mph C. 75 mph D. 40 mph E. 45 mph