Solve.The monthly cost of a certain long distance service is given by the linear function 
where C(t) is in dollars and t is the amount of time in minutes called in a month. Find the cost of calling long distance for 140 minutes in a month.
A. $18.75
B. $23.95
C. $9.80
D. $19.75
Answer: D
Mathematics
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Evaluate the integral.
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Graph the inverse of the function plotted, on the same set of axes. Use a dashed curve for the inverse.
A. 
B. 
Function is its own inverse.
C. 
D. 
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Add or subtract.
+ 
A. 
B. 
C. 
D. 
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Is f continuous at 4 ?
Mathematics