1. ## t scores

for the problem
Find the margin of error for the 94% confidence interval for the mean blood pressure of women with n=92, xbar=114.9, stddev=13.2.

I know the formula for the margin of error but how do you find the t-score using the t table?

2. I assume you're obtaining a CI for a mean.
In that case you have n-1=91 degrees of freedom
Now a t with 91 df is quite close to a normal percentile, which is probably what you're
expected to use.
However there are some nice stat calculators online, such as
http://www.danielsoper.com/statcalc/calc10.aspx
If I understand your question.... I get $t_{91,.03}=2.204651$