Answer:
Step-by-step explanation:
The partial sum of an arithmetic sequence is: 
where a1 is the first term, an is the nth term, and Sn is the partial sum of up to the nth number in the series. Let's apply the formula.
The first term, a1 is:
a1 = 2/3 (1) + 5/6 = 2/3 + 5/6 = 3/2
The nth term is an = 2/3 n + 5/6
The formula should be:
Answer:
5
Step-by-step explanation:
b = 13 - 8 = 5
Thx lolololoooopoooooooolol
Answer:
(a) 2%
Step-by-step explanation:
A score of 60 is 2 standard deviations below the mean (80 -2·10 = 60). The empirical rule tells you that 95% of the distribution is within 2 standard deviations of the mean. The remaining 5% is split evenly between those that are more than 2 SD above the mean and those that are more than 2 SD below the mean.
That tells you the percentage who failed is about 2.5%. The best answer choice is 2%.
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<em>Additional comment</em>
The empirical rule is a little bit sloppy, but it gets you in the ballpark. The actual percentage is closer to 2.275%.
Answer:
Aiko should not have put both of the 'i' out of the brackets.
Step-by-step explanation:
As only one integer has i with it, it is not possible to take the i out of the bracket.
