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Calvin has \$8.80 in pennies and nickels. If there are twice as many nickels as pennies, how many pennies does Calvin have? How many nickels?

Curtis can unload a truckload of hay in 30 minutes, but it takes Ronnie 40 minutes to do the same. Working together, how many minutes will it take them to unload 35 truckloads of hay?

Frank and Jamal are competing in the 75 km Bicycle ride. each of them has a set separate goal for speed, distance, and time. 1.) Jamal has set a goal of reaching the 50 km marker. he knows...

1a.) the bacteria in his blood are doubling every 42 minutes in the lab.  *Write and exponential equation to represent the total bacteria in Raul's body. let x represent time in 42...

If a plane can travel 490 hours with the wind and 430 hours against the wind, find the speed of the wind and the speed of the plane in still air.

A group of scientists studied the affect of a chemical on various strains of bacteria. Strain A started with 12000 cells and decreased at a constant rate of 3000 cells per hour after the chemical...

A bicycle costs 3600 per month to operate. The store pays an average of \$80 per bike. The average selling price of each bicycle is \$120. How many bicycles must the store sell each month to break...

A traveler is walking on a moving walkway in an airport. The traveler must walk back on the walkway to get a bag he forgot. The traveler's ground speed against the walkway is 3ft/s and 7ft/s with...

While Mr .William was at camp, his mother sent him a care package. What is the volume of the box if it measures 4.5 in. by 5 in. by 3.5 in.?