Under the normal curve,approximately what percentage of scores falls between -1 and -2 standard deviations below the mean?

A) 14%
B) 34%
C) 68%
D) 95%

A mortgage contract for $145,000 written 10 years ago is just at the end of its second five-year term. The interest rates were 8% compounded semi-annually for the first term and 7% compounded semi-annually for the second term. If monthly payments throughout have been based on a 25-year amortization, calculate the principal balance at the end of the second term.

Mike Hatcher Ski Shop had 309 pairs of skis in stock at the beginning of the month. In the four weeks of the month the shop sold 32, 19, 46, and 22 pairs of skis. During the month, Mike bought 39 additional pairs of skis for his inventory. What was the month end inventory?