Solve.An express train travels 267 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 7 hours, find the speed of the train on level terrain.
A. 51 mph
B. 41 mph
C. 31 mph
D. 21 mph
Answer: B
Mathematics
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A. {0} B. {42} C. ? D. {all real numbers}
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Find the exact value of the product.cos 
cos 
A. 
- 
B. 
+ 
C. 
+ 
D. 
- 
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Write an expression for the nth term of the geometric sequence. Then find the indicated term.
a. 
b. 
c. 
d. 
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