At zero economic profits, a competitive firm:
a) has an incentive to leave the industry to make higher profit elsewhere. is making a normal profit;
b) its revenues are just sufficient to cover all costs of production, including opportunity costs.
c) is unable to pay its opportunity costs of production but will remain in business to minimize losses.
d) will benefit, in the form of higher profits, by raising its prices above average cost.

The food services division of cedar river amusement park inc. is studying the amount families who visit the amusement park spend per day on food and drink. a sample of 40 families who visited the park yesterday revealed they spent the following amounts: see worksheet 1 for data and answer the following questions: a. organize the data into a frequency distribution, using seven classes and 15 as the lower limit of the first class. what class interval did you select? b. what percent of families spent less than $45? c. what percent of families spent $55 or more? d. how many families spent from $65 to 74.99?