I think the answer is true although i'm not sure. please go back to your lesson and check, everything says there. I'm guessing you are home-schooled so just go through the lesson while doing the test, this way you will know for sure that you got everything right.
Answer:
Bob must use $4,000 newspaper ads in two numbers
Explanation:
As given in the question -
Total number of people affected by $5,000 TV ad
Total number of people affected by two $5,000 TV ad
Total number of people affected by $5,000 TV ad 
Total number of people affected by two $5,000 TV ad 
Hence, more number of people are affected by two news paper adds of $4,000
Answer: a tax equal to the external cost.
Explanation:
The most efficient taxes are those that will be equal to the external cost of production that a company is imposing on the environment. This means in effect that a company is paying for the pollution it is inflicting on the environment.
Companies polluting less would pay less and those polluting more would pay more. This is the logic of a tax equal to the external cost.
<span>If in December 1994 a man in Ohio decided to deposit all of the 8 million pennies he’d been saving for nearly 65 years, then his transactions deposits will be $8,000,000, his total reserves will be all in all 8 million pennies.</span>