The last full week in November 2010 was November 15-19.
The yields on one-year United States Treasury securities adjusted for constant maturity for this week are:
Monday, November 15
Tuesday, November 16
Wednesday, November 17
Thursday, November 18
Friday, November 19
These yield rates come from the U.S Department of the Treasury's Interest Rate Statistics, specifically the one-year Daily Treasury Yield Curve Rates from Treasury's web site.
The average of these five yields is 0.27%. The required interest rate, rounded to the nearest tenth of a percent, is 0.3%.