Solve the problem.If an automobile is traveling at velocity V (in feet per second) , the safe radius R for a curve with superelevation ? is given by the formula 
where f and g are constants. A road is being constructed for automobiles traveling at 50 miles per hour. If 
and 
calculate R. Round to the nearest foot. (Hint: 1 mile =
5280 feet)
A. R = 722 ft
B. R = 706 ft
C. R = 1172 ft
D. R = 742 ft
Answer: A
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Use the Montonicity Theorem to find where the function is increasing and where it is decreasing.f(x) = 7x - 5
A. Increasing on 
, decreasing on 
B. Decreasing on (-?,?)
C. Increasing on (-?,?)
D. Increasing on (-?, -5], decreasing on [-5, ?)
Construct a phase line. Identify signs of y' and y".
= (y + 1)(y - 2)
A. 
B. 
C. 
D. 
Solve the problem.Find the optimum number of batches (to the nearest whole number) of an item that should be produced annually (in order to minimize cost) if 180,000 units are to be made, it costs $3 to store a unit for one year, and it costs $340 to set up the factory to produce each batch.
A. 30 batches B. 22 batches C. 28 batches D. 20 batches
Divide and simplify.
÷ 
A. 12z
B. 
C. 
D. 