A coin flipped 10 times and shows tails each time. Is there statistical significance to say that the coin is not a fair coin

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?