I only know how to do # 7.
7. 4.5^2 + 6^2 = 7.5^2
20.25 + 36 = 56.25
56.25 = 56.25
yes, the card is a right triangle because A and B added together equals the same as C
I = P x R x T
I = 6000 x .04 x 2
I = $480
He will be paid $480 interest in the first two years
For the first one it’s 9490 & for the second it’s 860
Total money = 150 + 95 + 210 + 45 + 55 + 165 = $720
Total months is 6
Mean = 720 / 6 = $120