Bill mows lawns for money and he can mow up to 5 lawns in a day. The following table shows Bill's total benefit and total cost of mowing lawns. What is Bill's optimal number of lawns mowed in a day?

Quantity on Lawns Mowed	Total Cost	Total Benefit
0	$0	$0
1	$12	$15
2	$22	$30
3	$32	$45
4	$45	$60
5	$59	$75

options:

	4
	2
	5
	3

The average total cost of baking 10 brownies is $10. The average fixed cost of baking 10 brownies is $7. What is the variable cost of baking 10 brownies?

options:

	70
	30
	3
	7

As a result of a shift in supply the percentage change in price is greater than the percentage change in quantity. This implies that demand is :

options:

	Elastic
	Not enough information to answer
	Unit elastic
	Inelastic

An attorney supplies 40 hours of work per week when her fee is $100 per hour, but supplies 60 hours of work per week when her fee rises to $120 per hour. Using the midpoint formula, her price elasticity of supply is equal to ________.

options:

	1
	0.8
	0.45
	2.2