Answer:
2,655 students
Step-by-step explanation:
The z-score for a 99% confidence interval is z = 2.576
The standard error for a proportion p is:

For a proportion of p =0.20, in order to ensure a standard error of 0.02, the sample size 'n' must be:

Rounding up to the next whole student, the sample size needed is 2,655 students.
Answer:
-3p-40
Step-by-step explanation:
-(7p+6)-2(-1-2p)
-7p-42+2+4p
-3p-40
Answer:
30000-2000=28000 feet.
This is a form of subtraction to use the ground and descend to ground level.
Step-by-step explanation:
Answer:
-4m + 4
Step-by-step explanation:
you distribute the -4 to the m making -4m and then distribute -4 to the -1 which makes +4