20 deliveries in 4 hours = deliveries per hour

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

Write the equations in logarithmic form 9^4=6,561