Solve the problem.Two trains leave a train station at the same time. One travels east at 8 miles per hour. The other train travels west at 10 miles per hour. In how many hours will the two trains be 50.4 miles apart?
A. 3.3 hr
B. 5.6 hr
C. 1.4 hr
D. 2.8 hr
Answer: D
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Solve the problem.A box with no top is to be constructed from a piece of cardboard whose width measures x in. and whose length measures 6 in. more than its width. The box is to be formed by cutting squares that measure 3 in. on each side from the four corners, and then folding up the sides. If the volume of the box will be 273 in.3, what are the dimensions of the piece of cardboard?
A. 25 in. by 19 in. B. 19 in. by 13 in. C. 37 in. by 22 in. D. 28 in. by 22 in.
Solve the problem.The time for a tennis ball to reach its maximum height is given by t = 
. If the speed of a tennis ball v is 32 m/s and the acceleration due to gravity is 9.8 m/s2, determine the time of flight for the ball for a 75.0° angle of elevation. Round results to an appropriate number of significant digits.
A. 0.97 B. 3.2 s C. 4.1 s D. 31 s
Integrate the function.
dx
A. ln 
+ C
B. ln 
+ C
C. ln 
+ C
D. ln 
+ C
Convert the given unit of measure to the measure shown.5.28 kilograms to grams
A. 0.0528 gram B. 5280 grams C. 528 grams D. 0.00528 gram