Caridad borrowed $15,500 at 11% ordinary interest for 120 days. after 70 days, she made a partial payment of $3,000. what is the final amount due on the loan? (round to the nearest cent)

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.

answer: check all that apply, where the options?

step-by-step explanation: