What is the average rate of change f(x) over the interval [4,13]?

The work will be finished in 10 days.

Step-by-step explanation:

Rashid can do a piece of work in 8 days

This means that each day he works, Rashid does of the work.

Tipu can finish in 12 days.

This means that each day he works, Tipu does of the work.

Each 2 days:

Each 2 days they work, the amount done is given by:

Each 2 days, 5/24 of the work is done:

The number of periods of 2 days that is needed to finish the work(100% = 1 completed), is given by:

2*4.8 = 9.6

Rounding up

The work will be finished in 10 days.