Find the area of the specified region.Shared by the circle r = 6 and the cardioid r = 6(1 + sin ?)
A. 0
B. 9(5? - 8)
C. 9(5? + 8)
D. 36
Answer: B
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Solve the problem.The position of an object moving in a straight line is given by s = t2 - 8t, where s is the distance in feet and t is the time in seconds the object has been in motion. How long (to the nearest tenth) will it take the object to move 6 feet?
A. 8.5 sec B. 1.2 sec C. 8.7 sec D. 7.0 sec
Solve.A circular walkway has a diameter of 266 m. Approximate the distance around the walkway. Use 
for 
A. 418 m B. 1672 m C. 836 m D. 222,376 m
Solve.A boat goes 480 miles downstream in the same time it can go 400 miles upstream. The speed of the current is 4 miles per hour. Find the speed of the boat in still water.
A. 40 mph B. 48 mph C. 88 mph D. 44 mph
Solve the problem.In economics, functions that involve revenue, cost and profit are used. Suppose R(x) and C(x) denote the total revenue and the total cost, respectively, of producing a new high-tech widget. The difference 
represents the total profit for producing x widgets. Given R(x) = 60x - 0.4 x2 and 
find the equation for P(x).
A. P(x) = -0.4 x2 + 63x + 13 B. P(x) = 3x + 13 C. P(x) = -0.4 x2 + 57x - 13 D. P(x) = 60x - 0.4 x2