Question

Find the consumers' surplus at a price level of $7 for the price-demand equation p=D(x)=35−0.2x where p is the price and x is the demand. Do not include a dollar sign or any commas in your answer.

Answer 1

we are given

p=7

Firstly, we will find equilibrium points

now, we can set up integral for consumer surplus

now, we can solve each integral

and then combine them

............Answer