One month, Ruby worked 6 hours more than Bobby, and Greg worked 4 times as many hours as Ruby. Together they worked 126 hours. Find the number of hours each person worked.

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.

Write the percent as a fraction or mixed number in simplest form. 0.8%