MATH PROOF PLS HELP

two column proof

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

Apackage of five erasers cost 0. $.39 at this rate how many how much would 60 erasers cost in dollars and cents