Directions: Fill in the blank place value chat. Round to the nearest place value 2.431 what is the nearest whole number and the nearest tenth and where would you put the number in a place value chart

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