Answer: 700 tons of coal consumed in 10 weeks.
Step-by-step explanation:
first you find how much coal is consumed in 1 week which is 70 tons, then you multiply the 70 tons by 10 weeks because you are trying to find how much tons of coal can be consumed in to weeks and when you do that you should get 700 tons of coal for 10 weeks.
AB=EF
ABEF=ABF+AEF
NOW CONTINUES THE SOLUTION
The derivative of 
is 
.
In this exercise we must apply the definition of derivative, which is described below:
(1)
If we know that , then the derivative of the expression is:
The derivative of is .
We kindly invite to check this question on derivatives: brainly.com/question/23847661
