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yan [13]
3 years ago
6

Writing if the original quantity is 20and the new quantity is 40, what is the percent increase? Use pencil and paper. Explain wh

at operation is equivalent to finding
this new quantity. Write the expression as an expression
The percent increase is %
Mathematics
1 answer:
yulyashka [42]3 years ago
7 0

The percentage increase of a given quantity from 20 to 40 is 100%.

Original quantity = 20

New quantity = 40

In order to calculate the percentage increase, one had to subtract the original quantity from the new quantity and then divide the value by the original quantity. This will be:

= (New quantity - Original quantity) / Original quantity × 100

= (40 - 20) / 20 × 100

= 20/20 × 100

= 1 × 100

= 100%

Therefore, the percentage increase of the quantity from 20 to 40 is 100%.

Read related link on:

brainly.com/question/24948729

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A college-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100.
yawa3891 [41]

Answer:

The probability is  0.003

Step-by-step explanation:

We know that the average \mu is:

\mu=500

The standard deviation \sigma is:

\sigma=100

The Z-score is:

Z=\frac{x-\mu}{\sigma}

We seek to find

P(x800)

For P(x>800) The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{800-500}{100}

Z=3

The score of Z = 3 means that 800 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x>800)=0.15\%

For P(x<200) The Z-score is:

Z=\frac{x-\mu}{\sigma}

Z=\frac{200-500}{100}

Z=-3

The score of Z = -3 means that 200 is 3 standard deviations from the mean. Then by the rule of the 8 parts of the normal curve, the area that satisfies the conficion of 3 deviations from the mean has percentage of 0.15%

So

P(x

Therefore

P(x800)=P(x800)

P(x800)=0.0015 + 0.0015

P(x800)=0.003

6 0
3 years ago
Write a compound inequality for the graph shown below.
irina [24]

A compound inequality for the graph would be:

x >= 0 and x < 2

7 0
4 years ago
What is half of 7 3/4 (please and thank you)
andrew11 [14]
3 7/8 or 3.875, ldjgkfkd
6 0
3 years ago
Read 2 more answers
3 pounds of bananas cost $7. At this rate, how much does 1 pound of bananas cost?
Furkat [3]

Answer:

<h2>$2.33</h2>

Step-by-step explanation:

To find the cost of 1 pound of bananas we use ratio and proportion

From the question

3 pounds of bananas costs $7

Then 1 pound will cost

\frac{7 \times 1}{3}  =  \frac{7}{3 }  \\  = 2.33333...

We have the final answer as

<h3>$2.33</h3>

Hope this helps you

7 0
3 years ago
Ellen can run 1/10 mile per minute. How many minutes will it take Ellen to run 3 miles?
belka [17]
It will take him 3 minutes
7 0
3 years ago
Read 2 more answers
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