The distance from the earth to the sun is 93 million miles. in scientific notation that is miles.

9.3 • 10-^7
9.3 • 10-^6
9.3 • 10^6
9.3 • 10^7

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

The function show two sisters' savings account and the rate at which they plan to deposit money

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?