Answer:
If you multiply 40$x9 you get 360$. Then you do 120$x2 you get 240$. All together you have 600$ from 2 movies and 9 commercials. That is the 11 commercials and movies they were talking about and there's your answer.
Step-by-step explanation:
-The margin of error is calculated using the formula:
-We substitute the values, n=900 and ME=30 in the formula to solve for standard deviation:
Hence, the population standard deviation is 547.1125
The population in 8 yrs would be 164,720