The arguments presented by economists regarding U. S. environmental command-and-control regulations generally

A. accept the goal of reducing pollution.
B. question the regulations as being the best policy tools for meeting reduction
goals.
C. assert that these laws are clear of the usual fine print, loopholes and
exceptions.
D. lack flexibility and a and b above.

To communicate effectively, you must understand the various factors that can affect the exchange of messages and to use communication techniques that are most appropriate for each individual situation.

Am i first to answer?

You're asking in the ap section, so i'll give the ap calculus-style answer. alternatively, you can find the vertex of the parabola and use the "y"-coordinate as the answer.

the maximum height can occur at a critical number, that is, a number  such that  .

the derivative of  can be calculated as follows:



find a value of  that is a zero of the derivative:


this is parabola that is opening downward; we can assume there is a maximum at  .

to find that maximum, calculate  .