9.A COVID relief bill provides $20,000 to all households with income below $50,000. After that income level, the benefit is withdrawn at a benefit-reduction rate of 20% starting with the first dollar of earned income. At what income would the benefit phase-out entirely?

Group of answer choices

$10,400

$140,000

$150,000

$160,000

$240,000

$200,000

$100,400

$100,000

1o.Gravity is

Group of answer choices

a public good

a common property good

a club good

a private good

11.Airplanes tend to fly over water along coasts as opposed to over homes. The primary reason for this is

Group of answer choices

to prevent a tragedy of the commons

negative externalities of flying planes

positive externalities of flying planes

public good nature of airplanes

airplanes can be considered club goods

13.A bottle of Club Soda is:

Group of answer choices

a public good

a club good

a common property good

a private good