Consider these sample data x1 =14, x2=4, x3=5, x4=20

  summation x=41 , n-4, x bar =1.25

Step-by-step explanation:

x1=14

x2=4

x3=5

x4=20

summation x=x1+x2+x3+x4

s0,

 summation x =12+4+5+20

=41

n=4

x bar= 41/4=1.25

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