What is the area of a triangle whose sides have length $\sqrt{70},$ $\sqrt{70},$ and $\sqrt{28}$?

The number of electoral votes each state is assigned is determined by the size of its population every ten years. the chart shows the number of electoral votes california was assigned each decade of the past century. what is the 3rd quartile of the data?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

How do you use the elimination method for this question? explain, because i really want to understand!