Solve the problem.Since 1960, the median age of men at their first marriage in a certain community has steadily increased. If x represents the the median age of these men at their first marriage, then x can be approximated by the formula 
where t represents the number of years since 1960. In what year will the median age of these men be 38 at first marriage? Round to the nearest year.
A. 1984
B. 2081
C. 2004
D. 1994
Answer: D
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Which of the following is the best measurement system to estimate the speed of an car? ?
A. ?miles per minute B. ?miles per hour C. ?feet per mile D. feetper minute E. ?miles per second
Use the two steps for solving a linear programming problem to solve the problem.An airline with two types of airplanes, P1 and P2, has contracted with a tour group to provide transportation for a minimum of 400 first class, 750 tourist class, and 1500 economy class passengers. For a certain trip, airplane P1 costs $10,000 to operate and can accommodate 20 first class, 50 tourist class, and 110 economy class passengers. Airplane P2 costs $8500 to operate and can accommodate 18 first class, 30 tourist class, and 44 economy class passengers. How many of each type of airplane should be used in order to minimize the operating cost?
A. 5 P1 planes and 17 P2 planes
B.
| 9 P1 planes and 13 P2 planes |
C. 11 P1 planes and 7 P2 planes
D. 7 P1 planes and 11 P2 planes
Solve the problem.One side of a rectangle is 7 inches and the other side is x inches. Find the value of x if the area must be at least 84 square inches.
A. x ? 12 B. x ? 12 C. x = 12 D. 0 < x ? 12
Answer the question or provide an explanation.True or false? If a function f has an inverse function, then f is one-to-one.
A. True B. False