Apuzzle and put together has a length of 12 in and a width of 10 and 1/2 in each puzzle piece is 3/4 pin how many puzzle pieces are there

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

What is another way to express 36 +32