If a loan is taken out for $247 at 7% and costs $155.61, how long was the loan for? Please show work

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?

Is the number 128.439 a rational number

Which is an x-intercept of the graphed function? (0, 4) (–1, 0) (4, 0) (0, –1)