Application - Direct and Inverse Variation

To wash 5 loads of dishes, a dishwasher needs 65 gallons of water. How many gallons of water are required if, for example, you need to wash 15 loads of dishes?

• 195 Galloons

• 185 Galloons

• 180 Galloons

• 175 Gallons

The number of hours to paint a house varies inversely with the number of painters working. A 2400-square foot house can be painted in 27 hours by 6 painters. How many painters would need to work in order to paint the same house in 18 hours?

• 8 Painters

• 9 Painters

• 10 Painters

• 11 Painters

The duty of choosing a DJ for Jimalalud National High School's forthcoming Junior-Senior Promenade has been delegated to the Supreme Student Government. They were able to locate a DJ who bills 1250 pesos for each three-hour period. If the dance goes on for nine hours, how much will the school be charged?

• 2500 Pesos

• 3500 Pesos

• 2750 Pesos

• 3750 Pesos

In Science the density of a matter at a certain mass is inversely proportional to it's volume. A metal bar made of pure iron has a density of 5 grams per cubic centimeters when it's volume is 200 cubic centimeters. Assuming that the mass will be constant, what is the density of an Iron Bar with a volume of 360 cubic centimeters?

• 9 grams per cubic centimeters

• 8 grams per cubic centimeters

• 7 grams per cubic centimeters

• 6 grams per cubic centimeters

A certain Samsung smart phone is capable of sending files worth 20 Gigabytes via ShareiT to a recipient phone for a time period of 5 minutes. Consider a scenario where the owner of the sender phone wants to transfer another set of files worth 8 GB. How long will the owner of the receiver phone have to wait for the files to transfer completely?