Solve the problem. Give an exact answer and an approximation to the nearest tenth.A painter leans a ladder against one wall of a house. At what height does the ladder touch the wall?
A. 
ft ? 28.6 ft
B. 
ft = 120 ft
C. 
ft ? 15.5 ft
D. 
ft ? 2.4 ft
Answer: C
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Solve.The sales of a new product (in items per month) can be approximated by 
, where t represents the number of months after the item first becomes available. Find the number of items sold per month 3 months after the item first becomes available.
A. 775 items per month B. 8375 items per month C. 4375 items per month D. 1175 items per month
Find an upper bound for the magnitude |E| of the error in the approximation f(x, y) ? L(x, y) at the given point over the given region R.
at 
; R: |x - 2| ? 0.2, |y - 1| ? 0.2
A. |E| ? 27.8784 B. |E| ? 21.8388 C. |E| ? 15.2064 D. |E| ? 21.5424
Provide an appropriate response.Graph: f(x) = 
-x
A. 
B. 
C. 
D. 
Solve the problem.Find the work done by a force of 16i (newtons) in moving as object along a line from the origin to the point 
(distance in meters).
A. 47.81 joules B. 48.00 joules C. 50.60 joules D. 16.87 joules