Solve the problem.Two bicyclists, 42 miles apart, begin riding toward each other on a long straight avenue. One cyclist travels 15 miles per hour and the other 20 miles per hour. At the same time, Spot (a greyhound), starting at one cyclist, runs back and forth between the two cyclists as they approach each other. If Spot runs 38 miles per hour and turns around instantly at each cyclist, how far has he run when the cyclists meet?
Fill in the blank(s) with the appropriate word(s).
45.6 mi
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Let x be a number. Translate the expression into an English phrase.x + 44
A. A number divided by 44 B. A number multiplied by 44 C. A number increased by 44 D. A number decreased by 44
Solve the problem.Suppose 
is a mathematical model for actual time as a function of estimated time, where y represents actual time and x represents estimated time and m and b are constants. If 
and 
find y when x is 60 min.
A. 157.3 min B. 63.38 min C. 56.62 min D. 154.7 min
Divide and simplify. Assume that all variables represent positive real numbers.
A. 4x2
B. 12x
C. 12x2
D. 4x
Find an approximate value for the integral, using the trapezoidal rule with n intervals. Round the answer to the nearest tenth if necessary.
n = 4
A. 
B. 
C. 
D. 