The Attempt at a Solution
Since I'm rather confused on reading a logarithmic scale, I thought I'd post this to see if I'm doing this right and/or if there's a better way to do the problem.
a) T=500 C
using the # of intervals we can say that if d=.01, x=.5 intervals so...
similarly for d=.1
change in time = 3162-3.16 = 3158.8min
b) same process but use x=-.5 intervals and x=2.1
If this method does work, is there any way to interpolate values so I can be more exact? or is there a better way to do the problem in general?