Suppose you have a mean = 12 and a standard deviation = 3. What is the probability that a data member, x, is above 18?

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.