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antiseptic1488 [7]
3 years ago
10

The distance between -18 and 15 is equal to a. 18-15 b. -18-15 c. 15-18 d. 15-(-18)

Mathematics
1 answer:
Feliz [49]3 years ago
6 0

Answer:

d. 15-(-18)

Step-by-step explanation:

Take the second point and subtract the first point

15 - (-18)

15 + 18

33

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Answer:

A sample of 18 is required.

Step-by-step explanation:

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Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

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A previous study indicated that the standard deviation was 2.2 days.

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