Rewrite in simplest radical form the problem in the image below. Show and explain each step. Thank you for your time and help.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Find the area of the triangle shown 3 by 6

Factor the expression using gcf 9b+45