During a research experiment, it was found that the number of bacteria in a culture grew at a rate proportional to its size. At 9:00 AM there were 3000 bacteria present in the culture. At noon, the number of bacteria grew to 3800. How many bacteria will there be at midnight?

What is the distance between (–2 1/2,-3) and (1, –3)?

If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9

Fill in the blank 1. a rhombus is a rectangle a) always b) sometimes c) never 2. a square is a quadrilateral a) always b) sometimes c) never 3. a trapezoid is a kite a) always b) sometimes c) never 4. a quadrilateral is a kite a) always b) sometimes c) never 5. a square is a rhombus a) always b) sometimes c) never 6. a parallelogram is a rectangle a) always b) sometimes c) never