The cost of building a supermarket is related to the total area of the building. Data for the last 10 supermarkets built for Regork, Inc., are shown in the accompanying table. a. Develop a CER for the construction of supermarkets. Use the CER to estimate the cost of Regork's next store, which has a planned area of 23,000 square feet.
b. Compute the standard error and correlation coefficient for the CER developed in Part (a).

Building Area(ft^2) Cost($)
1 14,500 800,000
2 15,000 825,000
3 17,000 875,000
4 18,500 972,000
5 20,400 1,074,000
6 21,000 1,250,000
7 25,000 1,307,000
8 26,750 1,534,000
9 28,000 1,475,500
10 30,000 1,525,000

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

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 rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!

hello! just here for points! though i wish i knew!