Solve the problem.A freight train leaves a station traveling at 32 km/h. Two hours later, a passenger train leaves the same station traveling in the same direction at 52 km/h. How long does it takes the passenger train to catch up to the freight train?
A. 4.2 hr
B. 3.2 hr
C. 5.2 hr
D. 2.2 hr
Answer: B
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Graph the ellipse.
+ 
= 1 
A. 
B. 
C. 
D. 
Solve the problem.When the temperature stays the same, the volume of a gas is inversely proportional to the pressure of the gas. If a balloon is filled with 168 cubic inches of a gas at a pressure of 14 pounds per square inch, find the new pressure of the gas if the volume is decreased to 56 cubic inches.
A. 4 pounds per square inch B. 39 pounds per square inch C. 42 pounds per square inch D. 28 pounds per square inch
Solve.The area of the playing surface of the tennis court shown is 
square feet. If its width is 
feet, find its length.
A. (-24x + 3) feet B. (6x + 3) feet C. (36x2 + 138x + 24) feet D. (6x - 3) feet
Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62 B. 0.26 C. 0.22 D. 0.50