Answer:
2,436 students
Step-by-step explanation:
At a 90% confidence level, the z-score is 1.645 and the confidence interval is given by:

Where s is the standard deviation, and n is the sample size.
If they want the length of their confidence interval to be no greater than 0.2, it must be no further than 0.1 from the mean 'X':

Rounding up to the next whole number, the sample size should be 2,436 students.
Answer:
10
Step-by-step explanation:
Answer:
Degree: 4; Type: quartic; Leading coefficient: 1
Step-by-step explanation:
He traveled 20 feet after his snack