How many numbers are 3 units away 0

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

With finding limits of multi variable !

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.