There are 8 brooms and 6 mops in a janitor's closet. what is the ratio of the number of mops to the total number of brooms and mops?

a. 4/3
b.3/4
c.3/7
d.7/3

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