You find a sales receipt from a store that shows the total price as $40, and the total amount paid including sales tax as $42.
write an equation you can use to find the sales tax rate .
an equation is 42=__

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.

69.64%

step-by-step explanation: