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2 years ago

Is 0.85 a fraction or mixed number

Mathematics

1 answer:

MariettaO [177]2 years ago

4 0

It is a fraction.

For example : 50/100 ... 50 is a part on 100.

100 in decimal term would be 1.00

.85 is LESS than 1.00 causing it to be a part/ or portion of 100.

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Iris is making hats for the members of the school marching band. She can make 3 hats in 1 1/2 hours. She wants to know how many

likoan [24]

She makes 3 hats per 1 and 1/2 hours. Therefore she makes $\frac{3}{\frac{3}{2}}$ hats per hour. This fraction simplified is 2 hats per hour. This is the solution.

2 hats per hour.

7 0

3 years ago

A 90% confidence interval for the mean height of students

Westkost [7]

Answer:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

Step-by-step explanation:

Let X the random variable of interest and we know that the confidence interval for the population mean $\mu$ is given by this formula:

$\bar X \pm t_{\alpha/2} \frac{s}{\sqrt{n}}$

The confidence level on this case is 0.9 and the significance $\alpha=1-0.9=0.1$

The confidence interval calculated on this case is $60.128 \leq \mu \leq 69.397$

The margin of error for this confidence interval is given by:

$ME =t_{\alpha/2} \frac{s}{\sqrt{n}}$

Since the confidence interval is symmetrical we can estimate the margin of error with the following formula:

$ME = \frac{Upper -Lower}{2}$

Where Upper and Lower represent the bounds for the confidence interval calculated and replacing we got:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

4 0

2 years ago

What is the height of the prism if there is 30 square centimeters and the volume is 90 cubic centimeters

sammy [17]

Answer:

the height of the prism =3cm

Step-by-step explanation:

From the question :there is 30 square centimeters, we can deduce this is the area due to the unit

the volume is 90 cubic centimeters

Volume of prism = Area of base × height

We are to determine the height

90cm³ = 30cm² × height

divide both sides by 30cm²

height = 90cm³/30cm²

height = 3cm

Therefore the height of the prism is 3centimeters

8 0

2 years ago

At the baseball stadium there are 548 seats that are divided into 14 rows how many seats are in each row

tatyana61 [14]

Answer:

There are 39 seats I think.

Step-by-step explanation:

548 divided by 14 is a decimal but rounded it to the nearest full number.

5 0

2 years ago

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A bag contains only black marbles and white marbles . Ezra reached into the bag without looking , got 30 marbles , and found tha

Keith_Richards [23]

2/5

Since 12 out of 30 marbles were black, you can assume that the percentage of black marbles in the bag is 40% (Ex: 12/30=.4) The probability that the marble you pick is black is equal to the percentage of black marbles in the bag. 40% is equal to 2/5.

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2 years ago

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