a contractor finds that crew A takes 5 1/2 hours to construct a retaining wall and crew B can do the same job in 8 1/2 hours. if crew A and crew B work together how long will it take them to construct the retaining wall

A type of bead weighs about 3/16 ounce. If a group of these beads weighs 4 1/8 ounces, how many beads are in the group?

The weights of five grapefruits are 7.47 ounces 7.23 ounces 6.46 ounces 7.48 ounces and 6.81 ounces. Using the clustering estimation technique, what's the approximate total weight of the grapefruits?

What property is illustrated by the fact that 29+0=29

Ann is riding her bicycle. She rides for 22.5 kilometers at a speed of 9 kilometers per hour. For how many hours does she ride?

The sum of three consecutive odd integers is 69. find the integers

What is the surface area of a conical grain storage tank that has a height of 43 meters and a diameter of 14 round to the nearest square meters

There are 8 rulers in the drawer Sara took 3 rulers from the drawer how many rulers are now in the drawer

What is the value of "c" in the quadratic equation 3x 2 + 5x + 7 = 0?

What is the estimated sum? round each number to the nearest hundred before adding. 521,370 26,839

You are planning a 420 mile trip. You will drive at a rate of 60 mph. After 2 hours of driving you stop for 15 minutes. After two more hours, you will stop for 30 minutes to eat. Two hours later, you will stop for 15 minutes again.