Anybody have the answer? a correct answer?

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did

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