There are two types of hot-water heaters: tank and inline. An experiment is to be conducted to determine whether the life of the hot-water heater is the same for both types of hot-water heaters. In previous studies, it was determined that family size (small, medium, large) is associated with life expectancy of the water heater, but house size (small, medium, large) is not associated with life expectancy of the water heater. How would blocking best be used?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

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.

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.