Hehehe. Can someone help me with this math problem, giving out a huge amount of points! :)

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

The radius of a sphere is 3 inches. which represents the volume of the sphere?

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g