Helppp I'll mark the brainlest
who is was the first and last.

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide

Use the rule of 72 to calculate how long it will take for your money to double if its earning 6% in interest. a. 12yrs b. 16yrs c. 36yrs d. 72yrs

Steve has a rectangular gazebo in his back yard with a width of 3 feet less than times its length and an area of 156 square feet. what is the length of the gazebo, rounded to the nearest tenth?