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3 years ago

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in 1960 there were approximately 3,000 million people living on Earth in 1999 the population of Earth was approximately 6000 mil

lion people what was the approximate rate of increase in millions of people each year between these two years

1 answer:

sveticcg [70]3 years ago

4 0

The answer would be 1/4

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Answer:

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Step-by-step explanation:

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3 years ago

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

8090 [49]

Answer:

tanΘ = - $\frac{12}{5}$

Step-by-step explanation:

Using the trigonometric identities

• sin²x + cos²x = 1, hence

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• tanx = $\frac{sinx}{cosx}$

given sinΘ = $\frac{12}{13}$ , then

cosΘ = ± $\sqrt{1-(12/13)^2}$

Since Θ is in the second quadrant where cosΘ < 0, then

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= - $\sqrt{\frac{25}{169} }$ = - $\frac{5}{13}$

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3 years ago

Why is 20 to 40 is a 100% increase but 40 to 20 is a 50% decrease

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Its because 20 is doubling its self. Its using 100% of its number, While 40 is decreasing by 50%. Half of forty is 20. Half equals 50%.

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3 years ago

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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