Order these numbers from least to greatest: 2.25 x 10^9, 2.74 x 10^8, 2.8 x 10^8 * 1 point
2.25 x 10^9, 2.8 x 10^8, 2.74 x 10^8
2.74 x 10^8, 2.8 x 10^8, 2.25 x 10^9
2.74 x 10^8, 2.25 x 10^9, 2.8 x 10^8
2.25 x 10^9, 2.74 x 10^8, 2.8 x 10^8

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point

Let f(x) = x + 2 and g(x) = x2 + 4. find f(g(f(