A toxin increases from 12ppm to 48 ppm. What percent increase is this?

The solution set for 5v2 – 125 = 0 is

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

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