Select all the numbers that are written in scientific notation. 1.67 x 10^4
68.4 x 10^7
9 x 10^1
21.99 x 10^2
10 x 10^5
2.8 x 10^3

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32