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4 years ago

Explain the difference between perimeter and area

Mathematics

2 answers:

USPshnik [31]4 years ago

7 0

Answer:

Perimeter is the measurement of the line of a shape while Area is the measurement of the inside of the shape :) hope this helps

IrinaK [193]4 years ago

3 0

Answer:Area is the space covered and perimeter is the distance around!

Step-by-step explanation:

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8) A rectangular prism has a width of 9 cm, a height of 7 cm and a depth of 2 cm. What is the

kumpel [21]

Answer:

The answer is 126 $cm^{3}$

Step-by-step explanation:

The formula for the volume of a rectangle is L x W x H.

So you just plug in the numbers into the formula.

2 x 9 x 7

That equals 126.

3 0

3 years ago

Sally goes fishing with Dan. They catch 6 trout. If they equally split up the trout, how may will each one get

Kipish [7]

Answer:

they will get 3 each

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Estimate using mental math: 903.6 ÷ 29.1. Show how you would estimate mentally, then show your estimated answer.

Strike441 [17]

Answer:31

Step-by-step explanation:I would use my fingers mostly.

But, I just do it normally. I pretend I'm using a sheet of paper then I write on it for the equation.

903.6 divided by 29.1

Then I estimate it because I know that 29.1 can go into 903.6 about 31 times. Then I multiply 31 and 29.1 and i get around 903.6.

I hope this helps. I'm sorry if you get this wrong.

5 0

3 years ago

Read 2 more answers

The track team won a total of 18 medals. Three of the medals were gold. There were twice as many bronze medals as silver medals.

monitta

10 bronze medals

explaining:
if 3 of the medals were gold there would be 15 left. Since there was twice as many bronze from silver they would have 5 silver medals and 10 bronze.

4 0

3 years ago

The results of a national survey showed that on average, adults sleep 6.7 hours per night. Suppose that the standard deviation i

Roman55 [17]

Answer:

a) Atleast 75%

b) Atleast 88.9%

c) 95%

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 6.7

Standard Deviation, σ = 1.6

Chebyshev's Theorem:

Atleast $1 - \dfrac{1}{k^2}$ percent of data lies within k standard deviation of mean.

Empirical Rule:

Almost all the data lies within 3 standard deviation for a normal data.
Around 68% of data lies within 1 standard deviation of mean.
Around 95% of data lies within 2 standard deviation of mean.
Around 99.7% of data lies within 3 standard deviations o mean.

a) minimum percentage of individuals who sleep between 3.5 and 9.9 hours

$3.5 = \mu - 2\sigma = 6.7 - 2(1.6)\\9.9 = \mu + 2\sigma = 6.7 + 2(1.6)$

We have to find the percent of data lying within 2 standard deviation of mean.

Putting k = 2

$1 - \dfrac{1}{(2)^2} = 0.75 = 75\%$

Atleast 75% of of individuals who sleep between 3.5 and 9.9 hours.

b) minimum percentage of individuals who sleep between 2.7 and 10.7 hours

$2.7 = \mu - 3\sigma = 6.7 - 3(1.6)\\10.7 = \mu + 3\sigma = 6.7 + 3(1.6)$

We have to find the percent of data lying within 3 standard deviation of mean.

Putting k = 3

$1 - \dfrac{1}{(3)^2} = 0.889 = 88.9\%$

Atleast 88.9% of of individuals who sleep between 2.7 and 10.7 hours.

c) percentage of individuals who sleep between 3.5 and 9.9 hours per day.

Thus, we have to find the percentage of data lying within 2 standard deviation.

By empirical rule, around 95% of data lies within 2 standard deviation.

Thus, 95% of of individuals who sleep between 3.5 and 9.9 hours.

This is higher than the percentage obtained from Chebyshev's rule.

4 0

3 years ago