The price of a certain commodity in dollars per unit at time t (measured in weeks) is given by
?
.
?
How fast is the price of the commodity changing at 
?
?
A. Increasing at the rate of $13/wk.
B. Increasing at the rate of $19/wk.
C. Decreasing at the rate of $19/wk.
D. Increasing at the rate of $6/wk.
E. Decreasing at the rate of $13/wk.
Answer: C
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Use your calculator to evaluate the expression. If necessary, round your answer to the nearest thousandth.e-2.7
A. 0.367 B. 0.067 C. -0.067 D. -7.339
Solve the problem.Find the volume of the solid that lies between planes perpendicular to the x-axis at x = -2 and x = 2. The cross sections perpendicular to the x-axis are circles whose diameters stretch from the curve 
to the curve 
A. 9?2
B. 9?
C. 
?2
D. 
?2
Solve the problem.Find the image of the given figure under the translation that takes P to P'.
A. 
B. 
C. 
D. 
Solve.The sum of the squares of two numbers is 116 and the difference of their squares is 84. Find the two numbers
A. 10 and 4; 10 and -4 B. 10 and 4; 10 and -4; -10 and 4; -10 and -4 C. 10 and 4; -10 and -4 D. 10 and 4