The temperature in the ice rink must stay below 50° F. This morning the temperature was 68°F. The ice rink runs a cooling device, that can decrease the temperature by 4.5°every hour. How many hours will it take for the temperature to fall below 50°? * h ＜ 4
h ≤ 4
h ＞ 4
h ≥ 4

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p

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.