What percentage of the original amount of polonium-210 would be left after 600 days of decay?

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?

Kai walked one and two-thirds of a mile on saturday and four and one-sixth of a mile on sunday. how many miles did kai walk?

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?