# equation for the point elasticity as a function of quantity

3. The demand equation for a product is given by P =30 - 0.1Q²

a. Write an equation for the point elasticity as a function of quantity.

b. At what price is demand unitary elastic?

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#### Solution Preview

a. since P =30 - 0.1Q²

the differential of P is

dP/dQ = -0.2Q

The formula of point elasticity is

E = ...

#### Solution Summary

Point Elasticity is featured.

$2.19