The half-life of radium is 1600 years. If 3 kg are present now, how much will be present after 16,000 years?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Jermaine has t subway tokens. karen has 4 more subway tokens than jermaine. raul has 5 fewer subway tokens than jermaine. which expression represents the ratio of karen's tokens to raul's tokens

Write and solve a real word problem that involves determining distance on a coordinate plane