If d is the midpoint of the segment ac and c is the midpoint of segment db, what is the length of the segment ab, if ac = 3 cm. need an explanation!

A                          D                   C                          B

AC=3

AD = 1.5 since D is the midpoint

DC = 1.5

C is the midpoint DB then DC=CB

since DC=1.5 then CB=1.5

AB=AD + DC+CB

AB = 1.5 + 1.5+1.5

AB = 4.5cm

stop cheating

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