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Orlov [11]
3 years ago
12

In a newspaper, it was reported that yearly robberies in Springfield were up 50% to 279 in 2012 from 2011. How many robberies we

re there in Springfield in 2011? In a newspaper, it was reported that yearly robberies in Springfield were up 50% to 279 in 2012 from 2011. How many robberies were there in Springfield in 2011?
Mathematics
1 answer:
Elan Coil [88]3 years ago
8 0

Answer:

There were 186 Springfield robberies in 2011

Step-by-step explanation:

Think about what happens when you double a number.

You multiply it by 2. Since it's been doubles, we say is has had a 100% increase.

Likewise a 50% increase correlates to multiply by 1.5

Since we are trying to find the previous amount that experienced the increase, we divide by 1.5 to find the original amount because that amount*1.5 gives us 279.

Calling the original <em>r</em>, it is clear that 1.5<em>r</em>=279.

Solving for <em>r, </em>we find the original # of robberies to be 186.

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Given that \bar{x}=12.8\% and \sigma=5.0\%, given that the population mean is \mu=11\% and the sample size is n = 16, the test statistic is given by

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2 years ago
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Step-by-step explanation:

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According to the Pythagorean theorem, the square of the hypotenuse will be equal to the sum of the squares of the other two sides.

In the given triangle, the hypotenuse is the side that is represented by z. Another side on the triangle is represented by the value y.

Step 2:

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GarryVolchara [31]

Answer:

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2 years ago
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