I usually don't do collaboration components with like other people, I attend the live sessions to complete the collaboration component which is much easier.. Just check whens the next collab live session for the assesment u need to do.
Answer:
41.8 years
Step-by-step explanation:
From
A= 39000
r = 10.5%
P = $ 485
n=12
t = the unknown
t= [ ln(A) - ln(P) ] / n[ln(1 + r/n)]
t= ln 39000 - ln 485/ 12[ln(1+0.105/12)]
t= 10.57 - 6.18/0.105
t= 41.8 years
11.8
3(12.4) + 6(11.5) = 37.2 + 69 = 106.2
106.2/9 = 11.8