if the price of gas went from $3.499 a gallon to $3.079 a gallon what was the percent change in the price of the gas. was there an increase or decrease?

The answer is decrease since the number went down.

The percent change should be -12 percent

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