Answer:
1280000
Step-by-step explanation:
Given that a restaurant chain sells 200,000 burritos each day when it charges $6.00 per burrito.
For each $0.50 increase in price, the restaurant chain sells 10,000 less burritos.
If x is the number of times price increased then sales would be
[tex]200000-10000x[/tex]
Revenue after price change [tex]= (6+0.5x) (200000-10000x)\\= 1200000+100000x-60000x-5000x^2\\= 1200000+40000x-5000x^2[/tex]
Now we can use calculus to find maximum
Let R(x) = [tex] 1200000+40000x-5000x^2[/tex]
[tex]R'(x) = 40000-10000x\\R"(x) = -10000[/tex]
Equate first derivative to 0
we get x = 4
So maximum revenue is when 4 times price increased.
New price = [tex]6+4(0.5) = 8[/tex]
Sales = [tex]200000-40000 =160000[/tex]
Max revenue = [tex]160000*8=1280000[/tex].