Question 1164882
Profit(10)=-0.02*100+4000-1000=$2998

{{{graph(300,300,-10,20,-1000,10000,-0.02x^2+400x-1000)}}}


vertex is at x=-b/2a or -400/-0.04=10000 units for maximum profit.
That is 0.02*1000^2+400(10000)-1000=$1,999,000

{{{graph(300,300,-10000,10200,-1000000,2500000,-0.02x^2+400x-1000)}}}