;w; Thank you in advance! :3 The price of a piece of lumber in 2019 was $4. In 2021 is $8.50. By what percentage did the price of lumber increase?

The pressure exerted on the walls of a container by a gas enclosed within it is directly proportional to the temperature of the gas. if the pressure is 6 pounds per square inch when the temperature is find the pressure exerted when the temperature of the gas is 380 degrees f show work for the

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Find the area of the regular hexagon if a side is 20 cm.