Earth is approximately 4.54 * 10^9 years old. Humans are thought to have evolved around 2.5 * 10^5 years ago. For what percentage of the age of the Earth have humans been present? Give your answer to 3 s. f

Arandom number generator is used to model the patterns of animals in the wild this type of study is called

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212