Emily has six black marbles, ten clear marbles, and four blue marbles in a bag. If she picks one at random, what is the probability that she will pick a black marble?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.

The plant were you work has a cylindrical oil tank that is 2.5 feet across on the inside and 10 feet high. the depth of the oil in the tank is 2 feet. about how many gallons of oil are in the tank?