Solve the problem.The time it takes to travel a given distance at constant speed is given by the formula 
where t is the time, d is the distance, and r is the rate of travel. At 30 miles per hour, what distance can be traveled in 4 hours?
A. 24 mi
B. 60 mi
C. 240 mi
D. 120 mi
Answer: D
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Solve the inequality and graph the solution on the real number line.
?
?
A. 
B.
C.
D.
E.
Convert as indicated.90 ft to yards
A. 3240 yd B. 270 yd C. 10 yd D. 30 yd
Solve the problem.The rate of growth of profit (in millions) from an invention is approximated by 
where x represents time in years. The total profit in year 1 that the invention is in operation is $45,000. Find the total profit function P(x).
A. P(x) = -.5e-x2+ 229,000
B. P(x) = -.5e-x2+ 0.229
C. P(x) = - 
e-x2- 229,000
D. P(x) = - 
e-x2- 0.229
The graphs show the position s, velocity v = ds/dt, and acceleration a = d2s/dt2 of a body moving along a coordinate line as functions of time t. Which graph is which?
A. B = position, A = velocity, C = acceleration B. A = position, C = velocity, B = acceleration C. C = position, A = velocity, B = acceleration D. A = position, B = velocity, C = acceleration