Tasha invests $5,000 at 6% annual interest and an additional $5,000 at 8% annual interest. Thomas invests $10,000 at 7% annual i
2 answers:
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Answer:
2.50 standard deviations above the mean
Step-by-step explanation:
The z-score measures how many a measure is above or below the mean. If the score is positive it is above the mean. If it is negative, it is below. The zscore is given by
In which is the mean and
is the standard deviation.
In this problem, we have that:
Last year there were 64 inches of snow. How many standard deviations from the mean is that?
This is Z when X = 64. So
So the correct answer is:
2.50 standard deviations above the mean
Given:
The first four numbers in a pattern are 4, 2, 1, and 0.5.
To find:
The next three numbers in the pattern.
Solution:
We have a pattern,
4, 2, 1, 0.5
Clearly, it is a GP and the common ratio is because each term is half of its preceding term.
Next term after 0.5 =
Next term after 0.25 =
Next term after 0.125 =
Therefore, the next three numbers in the pattern are 0.25, 0.125 and 0.0625 respectively.
The discriminant of is
Negative, no real solutions.
Answer: -24