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mel-nik [20]
3 years ago
11

Suppose the population of a town is 9,800 and is growing 2% each year. a. Write an equation to model the population growth. b. P

redict the population after 7 years.
A. y = 9,800 • 1.02x ; about 11,257 people


B. y = 9,800 • 2x ; about 11,257 people


C. y = 9,800 • 2x ; about 1,254,400 people


D. y = 2 • 9,800x ; about 137,200 people
Mathematics
1 answer:
tiny-mole [99]3 years ago
8 0

Answer:

The correct option is A.

Step-by-step explanation:

The general exponential growth model is defined as

f(x)=a(1+r)^x

Where, a is initial value, r is growth rate and x is time.

The initial population of town is 9800 and growth rate is 2%. The population growth model is defined as

f(x)=9800(1+\frac{2}{100})^x

f(x)=9800(1+0.02)^x

f(x)=9800(1.02)^x

Put x=7 to find the estimated population after 7 years.

f(x)=9800(1.02)^7

f(x)=11257.119543\approx 11257

Therefore the correct option is A.

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I NEED HELP!!!
Elena L [17]

Answer:

D. -2,222.85

Step-by-step explanation:

87x(-25.55)=-2222.85x

Steps

87 x(-25.55)

remove parenthesis (-a)=-a

=-87x *25.55

multiply the numbers : 87 *25.55=2222.85

=-2222.85x

hope this helps lmk

your welcome and thanks (:

 

3 0
3 years ago
Each morning papa noted the birds feeding on his birdfedder . So far this month he had seen 59 blue jays ,68 black crows , 12 re
Oduvanchick [21]
To solve this question, you need to first look at the total amount of birds and then at the percentage of the blue jays that fed on the bird feeder out of all the other birds.

To calculate the total you add them all together:
59+68+12+1 = 140 birds 

Then the percentages of the blue jays that fed on his bird feeder are:
59/140 *100 = 42.143%

You want to see how many blue jays we can expect to see out of 300 birds. 
So you divide 300 by 100 to see what 1% is = 3 birds 

Then you multiply this amount (1% = 3 birds) by 42.134% which is the percentage of blue jays we can expect to see out of the 300 birds. 
3*42.134 = 126.43 

You round this off to 126 because you cant expect to see half a bird. Even if the answer had been 126.9, you would have rounded it of to 126 because no matter how close it is to the next whole number; you either have a whole bird or you don't.

Final Answer = 126
5 0
3 years ago
What fraction is equal to 0.7
olga nikolaevna [1]
The equal fraction is 7/10
5 0
3 years ago
Read 2 more answers
Estimate the Value Of Each Expression to the nearest integer .
omeli [17]

Answer:

see below

Step-by-step explanation:

14. We can represent 1 as √1 and 2 as √4 and because 1 < 3 < 4, we know that √3 is in between 1 and 2. However, 3 is closer to 4 than it is to 1 so √3 is about 2.

15. Again, 3 is √9 and 4 is √16. 9 < 10 < 16 so √10 is in between 3 and 4, however, since 10 is closer to 9 as it is to 16, we know that √10 is about 3.

16. -4 = -√16 and -5 = -√25, since 16 < 22 < 25, we know that -√22 is in between -4 and -5 but 22 is closer to 25 so the answer is -5.

17. -10 = -√100 and -11 = -√121 so -√120 is in between -10 and -11. Since 120 is closer to 121, the answer is -11.

5 0
3 years ago
Which question is statistical?
Stella [2.4K]
I thinks its B




p.s. spread le cheese ⌂
4 0
3 years ago
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