Solve the problem.The strength of a rectangular beam ( in pounds per square inch ) varies jointly as the width of the beam ( in inches) and the square of the depth ( in inches). If the strength of a beam that is 2 inches wide and 12 inches deep is 1728 pounds per square inch, what is the strength of a beam that is 7 inches wide and 14 inches deep?
A. 8232 pounds per square inch
B. 1372 pounds per square inch
C. 8211 pounds per square inch
D. 8247 pounds per square inch
Answer: A
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Find the future value of the ordinary annuity. Interest is compounded annually, unless otherwise indicated.PMT = $7,500, i = 7% interest compounded semiannually for 4 years
A. $131,254.61 B. $67,887.65 C. $282,173.37 D. $58,345.56
Use the Factor Theorem to determine whether x - c is a factor of f(x).6x3 + 8x2 - 7x - 2; x + 2
A. Yes B. No
Find the quotient.
A. 0 B. -6 C. Undefined D. 6
Solve the problem.Between 7:00 AM and 8:00 AM, trains arrive at a subway station at a rate of 10 trains per hour 
per minute). The following formula from statistics can be used to determine the probability that a train will arrive within t minutes of 7:00 AM. F(t) = 1 - e-0.17tDetermine how many minutes are needed for the probability to reach 30%.
A. 2.10 min B. 7.85 min C. 5.96 min D. 3.18 min