Explanation

where x is the number of days since the start of the job
and f(x) is the rate of change
Step 1
a)find the total expenditure if the job takes 12 days
so, as x represents the number of days, just replace and calculate
let x= 12

so
a) 51.1
Step 2
now, let's find the total spent on the job from the 10 to 20th day
a) find the x value ( number of days since the job started)
x= 20 days-10dys= 10
so
x= 10
Answer:
2x
Step-by-step explanation:
2x if you don't know the value of x.
The circle will form a sphere. (See 1st figure attached)
The rhombus (it can also be a square) will form a 2 cones attached at the bottom. (See 2nd figure attached)
The rectangle will form a cylinder. (See 3rd figure attached)
The triangle will form a cone.
Answer: The third figure.
because a midpoint mean middle so A----------M----------B
AM is 1/2 of AB as well as BM is 1/2 of AB
4------------5----------6 if 5 is the midpoint how much is between 4 and 5 and 5 and 6