For the demand function q=D(p)=310−p​,find the following. ​a) The elasticity ​b) The elasticity at p=90​, stating whether the demand is​ elastic, inelastic or has unit elasticity ​c) The​ value(s) of p for which total revenue is a maximum​ (assume that p is in​ dollars)

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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For the demand function q=D(p)=310−p​,find the following.
​a) The elasticity
​b) The elasticity at p=90​, stating whether the demand is​ elastic, inelastic or has unit elasticity
​c) The​ value(s) of p for which total revenue is a maximum​ (assume that p is in​ dollars)
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