Bob grows corn. Last year she grew 2,000 pounds of corns in a year while using 250 square feet of land and 1 worker. This year she doubled her land to 500 square feet, doubled her workers to 2, and grew 4,500 pounds of corns. She sells her rare, organic corns for $50 a pound. She pays her a worker $25,000 a year and rents her land for $100 per square foot for a year. What was Bob's total cost last year and this year?

Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.