You randomly draw a marble from a bag of marbles that contains 8 blue marbles, 5 green marbles, and 8 red
marbles.
What is P(draw a blue or red marble)?
If necessary, round your answer to 2 decimal places.

Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.

If the alternate hypothesis of an experiment is “the true mean height of the giraffes is more than 15 feet” what is the null hypothesis?

What is the benefit of converting measures in a ratio to the same unit