Approximate sqrt (39) to the nearest whole number

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?

From a group of 10 men and 8 women, 5 people are to be selected for a committee so that at least 4 men are on the committee. howmany ways can it be done?