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xenn [34]
3 years ago
10

8) During a clearance sale, a keyboard that normally sells for $49.99 is discounted for $34.99. What is the percent discount?

Mathematics
1 answer:
olganol [36]3 years ago
8 0
The percentage discount is 80%

80% of 50 is 40.

I hope this helps.
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A researcher wishes to estimate the proportion of X-ray machines that malfunction. A random 275 sample of machines is taken, and
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Answer:

Following are the solution to the given question:

Step-by-step explanation:

95\% Confidence Interval for both the percentage of all x-ray machines

p = the machinery's share is not working:

= \frac{228}{275}\\\\ = 0.829

\text{Margin of Error} = Z_{(\frac{\alpha}{2})} \times \sqrt{( p \times (1-p)}{n})

                         = 1.96 \times \sqrt{(0.829 \times \frac{0.171}{275})} \\\\= 1.96 \times 0.023 \\\\= 0.045

Lower 95\% Confidence interval = p - error margin = 0.829 - 0.045 = 0.784

Upper 95\% Confidence Interval = p + error margin= 0.829 + 0.045 = 0.874

So, 95\% Confidence Interval = ( 0.78 , 0.87 )

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3 years ago
I’ll mark as brainliest help plsss
tankabanditka [31]
It would be exponential
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marta [7]

Answer:

85+29x = 250

-85            -85

29x = 290

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Step-by-step explanation:

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3 years ago
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jarptica [38.1K]

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Step-by-step explanation:

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3 years ago
What are the chances that a coin toss will result in heads? (vs. tails)?
Alexus [3.1K]

Answer:

50/50

Step-by-step explanation:

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