5% times what equals 6.5

0.325

5% = 0.05

6.5*0.05

0.5*0.05=0.025

6*0.05=0.3

0.3+0.025=0.325

irrational, cannot

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.