The mean value of land and buildings per acre from a sample of farms is $1300, with a standard deviation of $300. The data set has a bell-shaped distribution. Assume the number of farms in the sample is 80.

Use the empirical rule to estimate the number of farms whose land and building values per acre are between $700 and $1900

If 20 additional farms were sampled, about how many of these additional farms would you expect to have land and building values between $700per acre and $1900

per acre?