Several pennies are tossed in the air. Twelve land heads up and fifteen land tails up. Which of the following ratios are correct?

How do you summarize data in a two-way frequency table?

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?

Lines b and c are parallel. what is the measure of 2? m2 = 31° m2 = 50° m2 = 120° m2 = 130°