How to multiply mixed numbers by whole numbers

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?