The mean value of land and buildings per acre from a sample of farms is

$1800,

with a standard deviation of

$300.

The data set has a bell-shaped distribution. Assume the number of farms in the sample is

72.

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

$1200

and

$2400.

enter your response here

farms (Round to the nearest whole number as needed.)