Answer:
8 2/5
= 8.4
Step-by-step explanation:
area = x^2 - 4x + 3
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The correct answer is answer B 10
<h3>
Answer: 8.323 (approximate)</h3>
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Explanation:
s = 32 = sample standard deviation
n = 40 = sample size
Despite not knowing the population standard deviation (sigma), we can still use the Z distribution because n > 30. When n is this large, the student T distribution is approximately the same (more or less) compared to the standard Z distribution. The Z distribution is nicer to work with.
At 90% confidence, the z critical value is roughly z = 1.645. This can be found using either a Z table or a calculator.
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We have these values:
- z = 1.645 (approximate)
- s = 32
- n = 40
Plug these values into the margin of error formula.
The margin of error is roughly 8.323
I rounded to 3 decimal places because z = 1.645 is rounded to 3 decimal places. If your teacher wants some other level of precision, then be sure to follow those instructions.
Answer:
448
Step-by-step explanation:
Assuming that each notebook contains the same amount of pages, you must first divide 512 by 8. You will find that each notebook contains 64 pages. Then, to find how many pages he filled with notes after completing 7 notebooks, multiply 64 by 7. You should get the answer, 448.