Solve the problem.The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew (in millimeters). The linear model for this data is 
where x is temperature and y is growth in millimeters. Use this model to predict the growth of a plant if the temperature is 57. 
A. 25.43 mm
B. 27.08 mm
C. 27.54 mm
D. 26.63 mm
Answer: D
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Evaluate the limit.
Solve the problem.Given that the polar equation r = 
models the orbits of the planets, estimate the closest approach of Pluto's orbit, for which 
and 
to the sun.
A. About 74 astronomical units B. About 30 astronomical units C. About 39 astronomical units D. About 50 astronomical units
Solve the problem.Suppose that an open box is to be made from a square sheet of cardboard by cutting out 
squares from each corner as shown and then folding along the dotted lines. If the box is to have a volume of 16 cubic inches, find the original dimensions of the sheet of cardboard. 
A. 
in. by 2
in.
B. 2 in. by 2 in.
C. 10 in. by 10 in.
D. 4 in. by 4 in.
Solve the problem.If the average cost per unit C(x) to produce x units of plywood is given by C(x) = 
, what is the unit cost for 40 units? Round your answer to the nearest hundredth, if necessary.
A. $6.00 B. $-2.50 C. $7.50 D. $0.75