Answer:
Standard error
Step-by-step explanation:
The standard deviation of the distribution of sample means is called the standard error of the means.
It is denoted by: 
The standard error is calculated using the formula: 
where n is the sample size and
is the population standard deviation.
Check the picture below.
thus is at 0 = -16t² + 96t +640,

well, clearly it can't be a negative value for the elapsed seconds, so it can't be -4.
425/1700 = 0.25
Therefore he spends 25% of his income on rent
Answer:
p = (5t)/9
Step-by-step explanation:
9 mins ---------- 5 pages
1 min -------------5/9 page
t mins ------------5/9 x t pages
Thus
p = (5t)/9
Answer: Could we see the choices?
Step-by-step explanation: