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katrin [286]
3 years ago
9

2 tenths in scientific notation

Mathematics
1 answer:
katrin [286]3 years ago
5 0
2x10-1 as the decimal place is 0.2 

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A line passes through the points
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y=-2x+7

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Me ayudan hacer este ejercicio con los pasos
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Step-by-step explanation:

a) 2/5 × 5/7 = 10/35 ➡ 2/7 (if needed to simplify)

b) 16/25 × 2/4 = 32/100 ➡ 8/25

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d) 4/11 × 12/9 = 16/33

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3 years ago
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the
Vedmedyk [2.9K]

Answer:

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Step-by-step explanation:

For confidence interval of 99%, the range is (0.005, 0.995). Using a z-table, the z-score for 0.995 is 2.58.

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Proportion is unknown. So, worse case proportion is 50%. p = 50% = 0.5.

\\ n = \left(\frac{\texttt{z-score}}{\texttt{margin of error}} \right )^2\cdot p\cdot (1-p) \\ = \left(\frac{2.58}{0.002} \right )^2\cdot 0.5\cdot (1-0.5)=416025

So, sample size required is 416025.

4 0
3 years ago
Using the segment addition postulate, which is true?
Ivenika [448]

Answer:

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Step-by-step explanation:

BD is divided up into 2 segements, BC, and CD so therefore, BC and CD equals BD

I hope this helps and please don't hesitate to ask if there is anything still unclear!

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3 years ago
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