For the following, assume that Plants A and B have the following marginal costs for reducing emissions:Number of units reduced Marginal costs for Plant A Marginal costs for Plant B1 3 12 5 23 7 34 9 55 11 9(a) The government tells both plants to reduce three units of output. How much does this "conventional" regulation cost each plant? Whatâs the total cost?(b) The government implements a carbon tax of $5 per unit. How much does each plant reduce? What is the total cost?(c) Which approach is cheaper? Why is the cheaper approach cheaper?

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.