Solve the problem.When making a long distance call from a certain pay phone, the first three minutes of a call cost $2.45. After that, each additional minute or portion of a minute of that call costs $0.50. Find the maximum number of minutes one can call long distance for $11.95.
A. at most 5 minutes
B. at most 22 minutes
C. at most 30 minutes
D. at most 19 minutes
Answer: B
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State whether the following involves permutations or combinations. It is not necessary to solve the problem.A record club offers a choice of 7 records from a list of 45. In how many ways can a member make a selection?
A. Combination B. Permutation
Find the length of the indicated portion of the trajectory.r(t) = (2cos t)i + (2sin t)j + 7tk, 0 ? t ? ?/2
A. 
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B. 
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C. 
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D. 
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Graph each system of inequalities and shade the portion of the graph represented by the solution set..
A. 
B. 
C. 
D. 
Provide an appropriate response.Solve the word problem using a system of equations with two unknowns:The area of a rectangular playground is 15,390 ft2. The perimeter is 514 ft. Find the length and width of the field.
What will be an ideal response?