The product of two numbers is 15 . One of the numbers is t . What expression represents the other number?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Find cot x if sin x cot x csc x = √2