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)

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

In the triangles, tr = ge and sr = fe. if = 3.2 ft, which is a possible measure of ? 1.6 ft 3.0 ft 3.2 ft 4.0 ft

What fraction is equivalent to 0.46464646··· a. 46⁄999 b. 46⁄100 c. 46⁄99 d. 23⁄50