A shoe store manager wanted to keep track of the prices of shoes that were purchased at her store. She recorded the prices of the shoes purchased by the next 13 customers. Amount Spent ($): 5, 18, 25, 28, 34, 35, 39, 42, 42, 50, 58, 60, 80

Complete the following statement:

“75% of the customers spent between $5 and $

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step-by-step explanation:

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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

step-by-step explanation:

i believe a. 12x≥120 is the answer