3 years ago

5. Which has at least 1 set of parallel sides but is not a parallelogram? Select all

Mathematics

1 answer:

viktelen [127]3 years ago

5 0

Answer:

Step-by-step explanation:

It has only two parallel sides

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I think the answer would be -24

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Which question can be answered by finding 2 1/2÷1/2?

Ksenya-84 [330]

Your answer would be 1 1/2 cups

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3 years ago

A recipe for waffles calls for 2 cups of flour and 3 teaspoons of baking powder.

katen-ka-za [31]

Answer:

8 teaspoons

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2 years ago

In a random sample of 8 people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.2 minutes. A 95

Elina [12.6K]

Answer: Margin of error = 6.58

Confidence interval = (26.91, 40.08)

Step-by-step explanation:

Since we have given that

Sample size n = 8

Sample mean = 33.5 minutes

Population standard deviation = 9.5 minutes

At 95% confidence interval,

α = 0.05

t = 1.96

So, Margin of error is given by

$t\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{9.5}{\sqrt{8}}\\\\=6.58$

Confidence interval would be

Lower limit:

$\bar{x}-6.58\\\\=33.5-6.58\\\\=26.91$

Upper limit:

$\bar{x}+6.58\\\\=33.5+6.58\\\\=40.08$

Hence, the interval would be (26.91, 40.08)

But at standard deviation 7.2 minutes, the confidence interval was (27.5, 39.5)

Confidence interval using the standard normal distribution is wider than the confidence interval using t distribution.

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3 years ago

Uncle Joe is cutting boards for bookshelves. If he begins with 9 feet of wood, how many shelves will he cut if each one is 1 1/2

kherson [118]

To get the answer, you divide the length of the board by the size of the pieces wanted, so the equation you get is

9/1.5 = 6

So you can get six 1.5in shelves from a 9ft board

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