1. at t = 0
100 = Aoe^0
Ao = 100
at t = 5
65/100 = e^-5k
k = ln(65/100) / -5
at t = 12
A = 100e^-12k <--- (sub in k and find the value)
10 = 100e^-kt
t = ln(0.1)/-k <--- (sub in k and find the value)
t = ?
Edit: hahaha beaten, twice.
im hoping to get my average up to about 68-70/84 by the time the exam comes up. i got about 18 years of past hsc and about 40 others papers from various sources. hopefully they'll help, as i dont plan to "study" ME1.
so any of the 2004ers want to estimate?
i would know 3 subtopics really well. In case of family this could be marriage, children and AFAs and talk about the 3 points pig_93 says up there for each subtopic.