Katy wants to reduce 180/315, but shes wants to do it in one step. which of the following is the greatest common factor that she should use to reduce this fractions ?
a: 5
b: 45
c: 9
d: 30

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Three friends went on a road trip from phoenix, az, to san diego, ca. mark drove 50 percent of the distance. jason drove 1/8 of the distance. andy drove the remainder of the distance. 1. andy thinks he drove 1/4 of the distance from phoenix, az, to san diego, ca. is andy correct? 2. the distance from phoenix, az, to san diego, ca, is 360 miles. how many miles did each person drive? 3. solve the problem. what is the answer in total?

What unit of been sure would be appropriate for the volume of a sphere with a radius of 2 meters