Charmaine purchased a prepaid phone card for $25. Long distance calls cost 9 cents a minute using this card. Charmaine used her card only once to make a long distance call. If the remaining credit on her card is $21.31 , how many minutes did her call last?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

The cone in the diagram has the same height and base area as the prism. what is the ratio of the volume of the cone to the volume of the prism? h hl base area-b base area =b volume of cone_1 volume of prism 2 volume of cone 1 volume of prism 3 volume of cone 2 volume of prism 3 oc. od. volume of cone volume of prism e. volume of cone volume of prism 3 2