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MatroZZZ [7]
3 years ago
11

The population of a country has been decreasing for several decades. In 1990, the population was about 167 million people. In 20

10, the population was about 163 million people. Determine the percent decrease in the country's population during this time.
The country's population decreased by about ___% during this time period (Round to one decimal place as needed)
Mathematics
1 answer:
kogti [31]3 years ago
7 0

Answer: The country's population decreased by about 2.4% during this time period.

Step-by-step explanation:

Since we have given that

In 1990, the number of people = 167 million

In 2010, the number of people = 163 million

We need to find the percent decrease in the country's population during this time.

Percentage would be

\dfrac{New-Original}{Original}\times 100\\\\=\dfrac{163-167}{167}\times 100\\\\=\dfrac{-4}{167}\times 100\\\\=-2.39\%\\\\=-2.4\%

Hence, the country's population decreased by about 2.4% during this time period.

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Help me on this question! Jake can carry 6 1/4 pounds of wood in from the barn.His father can carry 1 5/7 times as much as jake.
ioda

\text{ Jake father can carry } 10\frac{5}{7} \text{ or } \frac{75}{7} \text{ pounds }

<em><u>Solution:</u></em>

From given question,

Number of pounds Jake carry = 6\frac{1}{4} \text{ pounds }

Number of pounds his father carry is 1\frac{5}{7} times as much as jake

To find: Number of pounds Jake father can carry

<em><u>Convert the mixed fractions to improper fractions</u></em>

Multiply the whole number part by the fraction's denominator.

Add that to the numerator.

Then write the result on top of the denominator

\rightarrow 6\frac{1}{4} = \frac{4 \times 6+1}{4} = \frac{25}{4}\\\\\rightarrow 1\frac{5}{7} = \frac{7 \times 1+5}{7} = \frac{12}{7}

<em><u>Then according to question,</u></em>

\text{Pounds father carry } = \frac{12}{7} \text{ times the pounds jake carry }\\\\\text{Pounds father carry } = \frac{12}{7} \times \frac{25}{4}\\\\\text{Pounds father carry } = \frac{75}{7}\\\\\text{In terms of mixed fractions, }\\\\\text{Pounds father carry } = \frac{75}{7} = 10\frac{5}{7}

\text{ Thus, Jake father can carry } 10\frac{5}{7} \text{ or } \frac{75}{7} \text{ pounds }

3 0
3 years ago
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