Plot the indicated graphs.By pumping, the air pressure in a tank is reduced by 17% each second. Thus, the pressure p (in kPa) in the tank is given by 
, where t is the time (in s). Plot the graph of p as a function of t for 
s on semilog graph paper.
What will be an ideal response?
Answers will vary.
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Solve the problem.An auxiliary fuel tank for a helicopter is shaped like the surface generated by revolving the curve 
- 5 ? x ? 5, about the x-axis (dimensions are in feet). If a cubic foot holds 7.481 gallons and the helicopter gets 3 miles to the gallon, how many additional miles will the helicopter be able to fly once the tank is installed (to the nearest mile)?
A. 376 B. 125 C. 94 D. 188
Find the nth term an of the geometric sequence.-4, -8, -16, -32, -64, . . .
A. an = (-4)(2)n-1 B. an = a1 + 2n C. an = (-4)(2)n D. an = (-4)(2n)
Solve the problem.The polynomial function I(t) = -0.1t2 + 2t represents the yearly income (or loss) from a real estate investment, where t is time in years. After what year does income begin to decline?
A. 10 B. 13.33 C. 20 D. 9
Find a formula for the slope of the graph of 
at the point 
. Then use it to find the slope at the given point.
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A. 
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B.
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C.
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D.
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