In October 2009,there were approximately 5x10^7 members of a website. In January 2013, there were approximately 2x10^8 members. How many more members were there in January 2013 than in October 2009? Write your answer in scientific notation. There weremore members in January 2013 than in October 2009.

Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2

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

Which of the following circles have their centers on the x-axis? check all that apply.