Find the slope of a pipe that slopes down 1/5 inch per foot.

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

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?

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?