Maria always watches the forecast in the mornings. Last Monday she saw the temperature was 80 degrees and the prediction for the following Monday was 59 degrees. If the temperature decreases the same amount each day how many degrees does the temperature change in one day? Write and solve an equation.

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

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).

answer: (-6,3)

step-by-step explanation: