polonium-210 is a radioactive substance with a half life of 138 days. If a nuclear facility is handling 305 grams of polonium-210, then how many grams of polonium-210 will be left after 300 days.

Solve the system of equations. y= 2x y= x^2 - 15

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?

Drag each tile into the correct box. not all tiles will be used. find the tables with unit rates greater than the unit rate in the graph. then tenge these tables in order from least to greatest unit rate