ABC is a straight line. B.
С
The length of BC is four times the length of AB.
BC = 100 metres.
Work out the length AC.

It should be 125 as

BC=100

and it's four times the length of AB then

100/4=25

then 100+25=125

I hope this helps

answer: a

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