Tamara is going to the laundromat. she needs 6 quarters for each of the 4 machines that she is using. how many dollar bills must she insert into the change machine to have enough quarters to do her laundry? a) 3 b) 4 c) 5 d) 6 e) 7

Your Answer is D.

Simple addition of the value of Quarters can get us the correct answer.

It would take $1.50 to run one machine, and $1.50 x 4 = 6

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.