Evaluate the expression. Do not use a calculator.
A. 604,800
B. 10
C. 720
D. 5040
Answer: C
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Evaluate the integral.
A. 
B. 
C. 
D. 
Solve the problem.Fred is in a row boat that is 4 miles from the shore of a lake. He wants to get to his house, which is 15 miles down the shore, as shown below. He will row to shore and then jog the remaining distance along the shore. He can row at 3 miles per hour and can jog at 6 miles per hour. At about what point along the shore should he beach the boat and jog the rest of the way if he wants to get home as soon as possible? Round your answer to the nearest tenth of a mile, if necessary.4 miles
? 15 miles
A. 10.8 mi from home B. 12.7 mi from home C. 14.2 mi from home D. 9 mi from home
Solve the problem. Assume that relative maximum and minimum values are absolute maximum and minimum values.A company that manufactures tennis rackets has determined that the demand functions for the two types of rackets they produce are given by 
and 
where q1 is the price of the standard tennis racket, q2 is the price of the competition tennis racket, x is the weekly demand for standard rackets, and y is the weekly demand for competition rackets. How many of each type of racket must be produced to maximize revenue?
A. 26 standard rackets and 25 competitive rackets B. 25 standard rackets and 25 competitive rackets C. 26 standard rackets and 26 competitive rackets D. 25 standard rackets and 26 competitive rackets
A certain model of automobile has its gas mileage (in miles per gallon, or mpg) normally distributed, with a mean of 22 mpg and a standard deviation of 4 mpg. Find the probability that a car selected at random has gas mileage less than 21 mpg. Round your answer to four decimal places. ?
A. 0.4013 B. 0.9013 C. 0.0987 D. 0.5987 E. 0.1974