Particals have enough energy to break free from eachother and can move around freely; particals spread out in different directions. what kind of substance is described?

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?