Brian has 66 water bottles for the 5K race participants. In addition, he is planning to buy some boxes of water bottles that have 18 water bottles each. All of the boxes cost the same. Brian is not sure yet
about the number of boxes of water bottles he wants to buy, but he has enough money to buy up to
5 of them. Write a function to describe how many water bottles Brian can buy. Let x represents the
number of boxes of water bottles Brian buys. Find a reasonable domain and range for the function.

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answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

70 years.

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im with everythinglos so yeahhhhh

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