If there are 44 successful outcomes in a sample with a size of 80, what is the sample proportion?
O A. 0.55
OB. 0.45
O C. 0.36
OD. 0.44

The sample proportion is 0.55

Step-by-step explanation:

Given that:

Successful outcomes = 44

Size of sample = 80

We will divide the number of successful outcomes by size of sample to find the sample proportion.

Sample proportion =

Sample proportion =

Sample proportion = 0.55

Hence,

The sample proportion is 0.55

x=half

step-by-step explanation:

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