Find the measure of the arc or angle indicated by a question mark (?). Assume that lines that appear to be tangent are tangent.

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?

Given the median qr and trapezoid mnpo what is the value of x?

How many zeros does this polynomial function, y=(x-8)(x+3)^2