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Bas_tet [7]
3 years ago
11

In 2010, a city population was 55,210 and it was declining at a rate of 1.09 each year. What is the best prediction for when the

city population will first be below 48,000?
2019
2022
2025
2028
Mathematics
2 answers:
PSYCHO15rus [73]3 years ago
5 0
48000=55210(1-0.0109)^t
Solve for t
t=12.77 =13 years
2010+13=2023

So the answer is c
Volgvan3 years ago
5 0

Answer:

The city population will first be below 48,000 in the year:

2022

Step-by-step explanation:

It is given that:

In 2010, a city  population was 55,210

in 2011 the city population will be

(100-1.09)×55210/100=98.91×55210/100

                                  = 0.9891×55210

in 2012 the city population will be

0.9891×0.9891×55210

we have to find number of years t such that

(0.9891)^{t}55210

i.e. the thirteen years from 2010 we will have city population less than 48000

i.e. in the year 2022

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The sum of two polynomials is 8d^5-3c^3d^2+5c^2d^3-4CD^4+9. If one added is 2d^5-c^3d^4+8CD^4+1, what is the other added
insens350 [35]

Answer:

6d^5 - 3c^3d^2 + 5c^2d^3 + c^3d^4 - 12cd^4 + 8

Step-by-step explanation:

We need to subtract the given polynomial from the sum:-

8d^5 - 3c^3d^2 + 5c^2d^3 - 4cd^4 + 9 - (2d^5 - c^3d^4 + 8cd^4 +1 )

We need to distribute the negative over the parentheses:-

= 8d^5 - 3c^3d^2 + 5c^2d^3 - 4cd^4 + 9 - 2d^5 + c^3d^4 - 8cd^4 -1

Bringing like terms together:

= 8d^5 - 2d^5 - 3c^3d^2 + 5c^2d^3  + c^3d^4 - 4cd^4 - 8cd^4 + 9  

- 1

Simplifying like terms

=  6d^5 - 3c^3d^2 + 5c^2d^3 + c^3d^4 - 12cd^4 + 8  


8 0
3 years ago
Can someone give me the answer no links I’ll give brainliest
LiRa [457]

Answer:

1,334.5 \:  {cm}^{3}

Step-by-step explanation:

Height of the cylinder h = 17 cm

Radius of the cylinder r = 5 cm

V_{cylinder}  = \pi {r}^{2} h \\  \\  = 3.14 \times  {(5)}^{2}  \times 17 \\  \\  = 3.14 \times 25 \times 17 \\  \\V_{cylinder}  = 1,334.5 \:  {cm}^{3}

3 0
3 years ago
When Ximena commutes to work, the amount of time it takes her to arrive is normally distributed with a mean of 38 minutes and a
irga5000 [103]

Answer:

The interval that represents the middle 68% of her commute times is between 33.5 and 42.5 minutes.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean of 38 minutes, standard deviation of 4.5 minutes.

Determine the interval that represents the middle 68% of her commute times.

Within 1 standard deviation of the mean. So

38 - 4.5 = 33.5 minutes

38 + 4.5 = 42.5 minutes.

The interval that represents the middle 68% of her commute times is between 33.5 and 42.5 minutes.

6 0
3 years ago
Itskorey please help me im stuck again<br><br> one hundred seventy thousands
vlada-n [284]
17000
This time its thousands not hundreds, so you do 17 plus 000 wich would be thousands, like this
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1
thousand
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5 0
3 years ago
Read 2 more answers
What is twelve devided by 2760
dem82 [27]
The answer would be 0.0043478261
4 0
4 years ago
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