In some freshwater organisms there is a structure called a contractile vacuole that regulates water movement into and out of the cell. what explains the existence of the cv? a) the cv prevents the organism from drying out. b) the cv assists the organism in capturing prey. c) the cv the organism move through the water. d) the cv the organism maintain osmotic pressure.

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?

Christine wong has asked dave and mike to her move into a new apartment on sunday morning. she has asked them both, in case one of them does not show up. from past experience, christine knows that there is a 40% chance that dave will not show up and a 30% chance that mik a. what is the probability that both dave and mike will show up? (round your answer to 2 decimal places.) b. what is the probability that at least one of them will show up? c. what is the probability that neither dave nor mike will show up? (round your answer to 2 decimal places.)e will not show up. dave and mike do not know each other and their decisions can be assumed to be independent.

Proportions in triangles solve for x