The standard error of the mean is 128.125.
The formula for standard error is:

With our information, we have:
Answer:
I say D cuz if u look at it, it's a pretty wide enough angle to be at least 47°
1. is 5 seconds
2. would be about 105 because is goes a tiny bit over 100
Answer:
36
Step-by-step explanation:
i multpliy 9x4=36
Answers:
The next two terms are 67.5 and 101.25 in that order.
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Explanation:
Divide the second term over the first to get 30/20 = 1.5
Divide the third term over the second term to get 45/30 = 1.5
The common ratio is 1.5, which means we multiply 1.5 by each term to get the next term
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fourth term = 1.5*(third term) = 1.5*45 = 67.5
fifth term = 1.5*(fourth term) = 1.5*67.5 = 101.25
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As a shortcut you can plug n = 4 and n = 5 into the function t(n) = 20*(1.5)^(n-1) to get the fourth and fifth terms respectively.