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Dima020 [189]
3 years ago
8

In 2010, the population of a city was 168,000. From 2010 to 2015, the population grew by 8%. From 2015 to 2020, it fell by 5%. T

o the nearest 100 people, what was the population in 2020?
Mathematics
1 answer:
stepan [7]3 years ago
6 0

Answer:

172000

Step-by-step explanation:

Population growth from  2010 to 2015 if population increased by 8% =

1.08 x 168,000. = 181440

Population growth from  2015 to 2020 if population decreased by 5% =

0.95 x 181440 = 172,368

Rounding off to the nearest 100 people = 172,000

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Charlie guesses that his dog weighs 34. 5 pounds. The dog actually weighs 32. 7 pounds. What is the percent error in Charlie’s g
expeople1 [14]

Percent error is the amount of error to actual value, in percent. The percent error in Charlie’s guess is approximately: Option D: 5.5%

<h3>How to calculate the percent error?</h3>

Suppose the actual value and the estimated values after the measurement are obtained. Then we have:

Error = Actual value - Estimated value

To calculate percent error, we will measure how much percent of actual value, the error is, in the estimated value.

\rm Percent \: Error = |\dfrac{Error}{Actual value}|\times 100 \\\\Percent \: Error = | \dfrac{\text{(Actual Value - Estimated Value)}}{Actual value}|\times 100 \\

(here |x| is such that it makes x non negative, thus, |-5| = 5, and |5| = 5)

For the given case, it is specified that:

Actual weight of dog = 32.7 pounds

Guessed weight of dog, by Charlie : 34.5 pounds.

Error = 32.7 - 34.5 = -1.8 pounds

Thus, percent error in Charlie's guess is calculated as:

\text{Percent Error} = |\dfrac{-1.8}{32.7}| \times 100 \approx 5.5\%

Hence, the percent error in Charlie’s guess is obtained approximately is given by: Option D: 5.5%

Learn more about percent error here:

brainly.com/question/25749180

3 0
2 years ago
Please answer this and if you do then I will give away 200 points for free PLEASE HELP AND DONT WASTE IT'S RUDE AND UNHELPFUL
ludmilkaskok [199]

Answer:

1. 3rd choice

2. 1st choice

3. true

4. false

5. not sure i think 3rd choice tho

6. 90

7. 35

5 0
3 years ago
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an auditorium holds 72 people for a school assembly. only staff and students will attend. if the number of students is 8 times t
lina2011 [118]

Answer:

I would say there should be about 63 students

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What is the same as 7-(3+4)
ella [17]

Answer: 0

Step-by-step explanation:

first you distribute the negative which gives you 7-3-4 which equals 0

3 0
4 years ago
ajwad went apple picking.He picked a total of 84 apples and brought them all to school.If there are 21 students,how many apples
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I'm pretty sure the answer is 4 because, 4*21= 84.
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3 years ago
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