Graph the integrand and use areas to evaluate the integral.
A. 21
B. 15
C. 7
D. 
Answer: A
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Solve.The temperature on a March morning is -9°F at 6 a.m. If the temperature drops 2° by 7 a.m., rises 6° by 8 a.m., and then drops 2° by 9 a.m., find the temperature by 9 a.m.
A. 7°F B. 19°F C. -7°F D. -19°F
The graph of a function is given. Determine whether the function is increasing, decreasing, or constant on the given interval.[2.2, 5] 
A. increasing B. decreasing C. constant
Solve the problem.The rate of growth of profit (in millions) from an invention is approximated by 
where x represents time in years. The total profit in year 2 that the invention is in operation is $15,000. Find the total profit function P(x).
A. P(x) = -0.5e-x2+ 24,000
B. P(x) = - 
e-x2- 0.024
C. P(x) = - 
e-x2- 24,000
D. P(x) = -0.5e-x2+ 0.024
Use a calculator to approximate the square root. Round to three decimal places.- 
A. -4.200 B. -0.042 C. Not a real number D. -0.004