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wel
3 years ago
9

Evaluate each expression. Name the property used in each step.

Mathematics
1 answer:
IRINA_888 [86]3 years ago
4 0

1. (1 / 5)5 * 14 = 14 because 1/5 multplied by 5 is equal to 1. I believe this is called reciprocals.

2. 6 + 4 (19 - 5) = 6 + 4(19) - 4(5) = 6 + 76 - 20 = 62. This is called the distributive property.

3. 5 (14 - 5) + 6 (3 + 7) = 5(14) - 5(5) + 6(3) + 6(7) = 70 - 25 + 18 + 42 = 105. We also used the distributive property in this question.

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We want to see how much the population of goats grows each year. We will see that the correct option is c: 17%.

<h3>Exponential growth of populations</h3>

We know that:

  • The initial number of goats is 1,500.
  • After 11 years, the population is 8,400.

The population can be modeled with an exponential equation as:

P(t) = A*(1 + r)^t

Where:

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  • r is what we want to find, it depends on how much the population increases.
  • t is the time in years.

So we have:

P(t) = 1500*(1 + r)^t

And we know that after 11 years the population is 8,400, so we have:

P(11) = 1500*(1 + r)^11 = 8400

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To get it in percentage form, you just need to multiply it by 100%

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This means that the population increases a 17% each year, so the correct option is c.

If you want to learn more about exponential growth, you can read:

brainly.com/question/13223520

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