Astudy of sleep patterns randomly selected participants in the study to sleep in either a dark room or a room with light.

which element of experiment design is known to be a part of this study?

a.
blinding

b.
replication

c.
randomization

-6 is the correct option from the above given options

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