Solve the problem.An express train travels 360 miles between two cities. During the first 
of a trip, the train traveled through mountainous terrain. The train traveled 
per hour slower through mountainous terrain than through level terrain. If the total time to travel between the cities was 9 hours, find the speed of the train on level terrain.
A. 30 mph
B. 60 mph
C. 45 mph
D. 15 mph
Answer: C
Mathematics
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Simplify.
A. 
B. 
C. 
D. 
Mathematics
Express as a single logarithm and, if possible, simplify.ln (x2 - 64) - ln (x + 8)
A. ln (x + 8) B. ln (x2 - 8) C. ln (x - 8) D. ln (x - 64)
Mathematics
Determine the amplitude and range of the function and sketch its graph.y = 3 sin x
A. amplitude: 3; range: [0, 3]
B. amplitude: 3; range: [0, 3]
C. amplitude: 3; range: [-3, 3]
D. amplitude: 3; range: [-3, 3]
Mathematics
Find the volume of the described solid.The base of a solid is the region between the curve y = 5cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are squares with diagonals running from the x-axis to the curve.
A. 
?
B. 
?
C. 6?
D. 
?
Mathematics