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kondaur [170]
3 years ago
7

Jamie go shopping for Christmas and saves $27.75 with a 15% off coupon what was her total bill

Mathematics
1 answer:
solniwko [45]3 years ago
7 0

Answer:

$185

Step-by-step explanation:

Initial bill = x

Amount saved = $27.7

Percentage of amount saved with coupon = 15%

15 = (27.75 / x) * 100

15 / 100 = 27.75 / x

15x = 2775

X = 185

Jamie's original bill was $185.

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You recently sent out a survey to determine if the percentage of adults who use social media has changed from 66%, which was the
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In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

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The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.5817 - 2.327\sqrt{\frac{0.5817*4183}{2809}} = 0.56

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.5817 + 2.327\sqrt{\frac{0.5817*4183}{2809}} = 0.6034

The 98% confidence interval estimate of the proportion of adults who use social media is (0.56, 0.6034).

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2 years ago
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Answer:

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