What is the difference in length between a 1 and 1/4 inch button and a 3/8 inch button

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle