Please help!!! Cara tracked the population of fish in a pond. At the end of the first year, she counted 8 fish. Over the years, the population tripled each year.

Which equation can be used to determine the number of fish, f, after t years?

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!