Walt made an extra $8000 last year from a part-time job. He invested part of the money at 8% and the rest at 7%. He made a total of $620 in interest. How much was invested at 7%?

597

step-by-step explanation:

4444444444444 i think

this is answer of 144 cubic meters

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.