Mark noticed todays lumber price at the local home depot was advertised as 3.40 per sqft. This price is 10% below last years price. Calculate last years price, showing each step os your work'

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

rick would give her the best deal as he will charge $8.88 per hour

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.