Solve the problem.Boyle's law states that if the temperature of a gas remains constant, then PV = c, where P is the pressure, V is the volume, and c is a constant. Given a quantity of gas at constant temperature, if V is decreasing at a rate of 12 in.3/s, at what rate is P increasing when P = 50 lb/in.2 and V = 80 in.3?
A. 
lb/in.2-s
B. 
lb/in.2-s
C. 
lb/in.2-s
D. 
lb/in.2-s
Answer: A
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Find the present value of the given annuity. Round to the nearest cent.Payments of $76 made quarterly for 10 years at 4% compounded quarterly
A. $2495.44 B. $2044.60 C. $2472.70 D. $746.18
Factor completely. If the polynomial cannot be factored, write prime.u2 - 10u + 21
A. (u - 7)(u + 3) B. (u - 7)(u - 3) C. (u + 7)(u - 3) D. (u + 7)(u + 3)
Simplify the expression.
A. x2 + xy + y2 B. x - y C. x2 - xy + y2 D. x2 + y2
Solve the problem.The table shows the number of new AIDS cases (in thousands) in the U.S. in five consecutive years.
Let x = 1 correspond to 1988 and let f(x) be the number of new AIDS cases (in thousands) in the U.S. in year x. Using the points 
and 
the following linear function is obtained to model the data: 
Compare the number of new AIDS
cases given by the model in 1990 with the actual number of new AIDS cases that year. How accurate is the model? What will be an ideal response?