Find the extreme values of the function subject to the given constraint.
A. Maximum: 1 at 
minimum: -1 at 
B. Maximum: 8 at 
minimum: -8 at 
C. Maximum: 1 at 
minimum: -1 at 
D. Maximum: 9 at 
minimum: -9 at 
Answer: D
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Write the expression in simplest form. If a radical appears in the denominator, rationalize the denominator.
A. 
B. 
C. 5a2b3
D. 
For the compound inequality, give the solution set in both interval and graph forms.x > 5 or x < 5
A. (-?, 5) ? (5,?)
B. {5}
C. (5, ?)
D. (-?, 5)
Solve the problem.An experiment is done to compare the average fuel economy of two models of cars. Several cars of each model were tested under similar conditions. The results are in the two tables below. Which car model is better?Car XCar YFuel Economy, in mpgFuel Economy, in mpg22 21 27 24 22 18 21 2221?21?27?27?27?24?21?2422?24?18?22?21?18?21?24
A. Car X B. Car Y
Provide an appropriate response.When the temperature T (in degrees Celsius) of a certain laboratory animal is reduced, its heart rate r (in beats per minute) decreases. At a temperature of 37°C, the animal had a heart rate of 200, and at a temperature of 
its heart rate was 140. If r is a linear function of T for 26 ? T ? 38, (a) determine this function and (b) determine the heart rate at a temperature of 30°C.
What will be an ideal response?