Triangles ABC and DEF are similar. Not to scale
A
6 cm
15 cm
20 cm
B
С
E
Work out the length of AC.

a - base

b - exponent

so,

the second option

step-by-step explanation:

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)