A scientist is studying a culture of bacteria. He starts with 300 bacteria, and the amount of bacteria doubles every hour. Which equation can be used to find the number of bacteria, y, after x hours?
A .y = 300x2
B. y = 300 (2x)
C. y - 2x + 300
D. y 300(2)
E. y = 2(300)

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

Fast! find the length of cu. the triangles are similar. show your work.