You have a glass paperweight that is shaped like a cone. the diameter of the paperweight is 7 centimeters. the slant height is 4 centimeters. find the surface area of the cone. use 3.14 to approximate pi.

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.

Which of the following vectors are orthogonal to (2,1)? check all that apply

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?