John earned $450 in a week. if he worked 14 hours during the week and 8 hours on saturday at time and a half and 2 hours on sunday at double time, what was his hourly rate of pay?

14 + (8 x 1.5) + (2 x 2) = 30 hours

$450 ÷ 30 = $15

hourly rate = $15

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.