Please help asap

Question

Question 1

Given the demand function D(p)=√(200-4p)

Find the Elasticity of Demand at a price of $8

Question 2

Given the demand function D(p)=300−3p^2

Find the Elasticity of Demand at a price of $4

Question 3

Given the demand function D(p)=350/p,

Find the Elasticity of Demand at a price of $61

Answer 1

D(p) = sqr(200-4p)

D(8) = sqr(200-32) = sqr168 = 2sqr42

Price elasticity of demand = % change in quantity demanded divided by % change in price

Point Price elasticity of demand = the limit of the above, as the price change approaches zero

rough guess is -.09, but convention is to take the absolute sign, so + 0.09 it is

this problem should have been filed under calculus and microeconomics, not just math