Two truckers leave San Francisco at the same time. They take 10 and 28 days, respectively, to reach their destination and return to San Francisco. The truckers each take continuous trips to and from San francisco. How many days will pass before the two truckers leave San Francisco on the same day again?

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.

the correct answer is c

good luck love