Right triangles and trigonmetry

Kevin has just finished paying off his loan. he was assessed a service charge of $422. he paid off the principal and the interest by making weekly payments of $36.13 for four years. if the principal was $7,150, how much did kevin pay in finance charges, to the nearest dollar? a. $498 b. $365 c. $422 d. $787

Find the total area for the regular pyramid ( follow the answer set up in the picture)

Which value would be a solution for x in the inequality 47-4x< 7