What is the product of 5/8 and 3/4? ?

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?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.