Linda borrowed $22000 from the bank. If the interest rate of the loan is 3.1%, what is the total amount she will have to pay back after 2 years?

$23,385.14

Step-by-step explanation:

1.031 = 103.1%. you have the 100% there to keep the initial money loaned and 3.1% for the additional interest

22000*1.031 = 22682 for one year and then multiply by 1.031 again with the new answer (22682) which gives you 23385.142 and round to 2 decimals for cents.

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.