In an arboretum the heights of five trees were 21 feet 31 feet 36 feet 28 feet and 26 feet. What would be the height of the sixth tree if the mean height of the six trees was 28 feet​

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?

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

Line wx is parallel to line yz. if m