Put least to greatest 1/4, 1/5, 1/8, 1/10

Two lines parallel to the same plane are parallel to eachother

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

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work