Pls help me, I have to find the area.

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?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*