The following are 10 employee salaries from a company of 500 employees. Calculate the variance of the salaries. $40,000

$60,000

$70,000

$50,000

$75,000

$100,000

$28,000

$65,000

$85,000

$64,500

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

$6.42

step-by-step explanation:

i need points

step-by-step explanation:

sorry bubs