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2 years ago

Find the percent of markup. Round to the nearest tenth $31.00 to $35.00.

Mathematics

1 answer:

zubka84 [21]2 years ago

8 0

1.1 is the percent of markup. 1 for the 31 dollars and .1 for the markup of 4

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In the 7th grade, 150 of the students are attending the dance. If this is 62.5% of the entire grade, how many 7th graders are th

JulijaS [17]

Answer:

244 students.

Step-by-step explanation:

Okay, so. We know 150 people of the 7th grade is coming and 62.5% is the entire of the 7th graders coming. We would multiply.

150 * 62.5% = 93.75

We would round it up. It is over 5, so it would be 94 students. Then we would add

150 + 94 = 244

There are 244 students in 7th grade.

3 0

2 years ago

"How much do students pay, on average, for textbooks during the first semester in college? From a random sample of 400 students

dezoksy [38]

Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

Step-by-step explanation:

Since we have given that

Sample size = 400

Mean = $357.75

Standard deviation = $37.89

At 95% confidence level, z = 1.96

We first find the margin of error.

Margin of error is given by

$z\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{37.89}{\sqrt{400}}\\\\=3.71$

95% confidence interval would be

$\bar{x}\pm \text{margin of error}\\\\=357.75\pm 3.71\\\\=(357.75-3.71,357.75+3.71)\\\\=(354.04,361.46)$

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.

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3 years ago

You have 8 dime you trade each dime for 10 pennies. How mainly pennies will you have?

laila [671]

Youll have 80 pennies. dime=.10 10x8=80

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3 years ago

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Step-by-step explanation:

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2 years ago

How do I divide 2x^4 + 5x^3 + x - 1 by x^2 - 2x + 1 using long division?

Elza [17]

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Step-by-step explanation:

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2 years ago