Work out the circumference of 6mm. give your answer in terms of pie.

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

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?

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm.it decreased by the same amount each year. what was the change in grandpa ernie's height each year