Use the given right triangle to find ratios, in reduced form, for sin A, cos A, and tan A. Please help I don’t have much time. Type an integer or a simplified fraction.

Which best explains why this triangle is or is not a right triangle?

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?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup