In a household, the metre reading for water at the end of june was 7848000litres. The metre reading at the end of July was 7908000 litres. The household was charged for consumption at the following rates:The first 10000 litres at #1 per litre. The remaining #1.50 per litre. Calculate;1The consumption at the end of July ,the total charge for the consumption

85000

Step-by-step explanation:

7908000 - 7848000 = 60000

The first 10000 litres is #1 per litre or 10000

The remaining 5 litres is 50000 * 1.5 = 75000

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.