The first term of an arithmetic sequence is 5 .the third term sequence is 13?

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

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?

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)