1) lance can paint the room in 5 hours, while kim can paint the same room in 4 hours.
how many hours would it take for them to paint the room together?
2) dominique can ice cupcakes twice as fast as houston. when they work together, dominique and houston can ice a large order of cupcakes in 5 hours.
how many hours would it take houston to ice them by himself?

1foot = 12 inches; 1 yard = 3 feet

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables