An 8.60 gram sample of hydrated crystal is heated to a constant mass of 5.9 grams. Calculate the percent, by mass, of water in the hydrate.

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

Uestion 1(multiple choice worth 5 points) (05.02)alex wants to paint one side of his skateboard ramp with glow-in-the-dark paint, but he needs to know how much area he is painting. calculate the area of the isosceles trapezoid. isosceles trapezoid with top base 12 feet, bottom base of 18 feet, and height of 6 feet. 72 ft2 84 ft2 90 ft2 108 ft2