Substitute to find the value of the expression.A train must cover a distance of 2581 miles. The velocity, in miles per hour, of the train is 
where t is the time, in hours, to complete the trip. If the train completes the trip in 29 hours, what is its velocity?
A. 74,849 mph
B. 89 mph
C. 84 mph
D. 0.01 mph
Answer: B
Mathematics
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Suppose ? is an angle in standard position. Given either a point on the terminal side of ? or an equation of the terminal side of ?, give the exact value of the indicated trigonometric function(s). (-20, 48); find sin ?.
A. 
B. 
C. - 
D. - 
Mathematics
Simplify the exponential expression using the rules for exponents.(x-1y6)-1
A. 
B. 
C. 
D. 
Mathematics
Solve.In how many ways can 7 people line up for play tickets?
A. 823,543 B. 7 C. 1 D. 5040
Mathematics
Write a fraction to represent the shaded portion of the figure.
A. 
B. 
C. 
D. 
Mathematics