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4 years ago

If r is seven more than the square of l, then r =

Mathematics

1 answer:

xenn [34]4 years ago

6 0

I think its r=I+7 because that would be the equation

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2.8 million deaths per year, express quantity in deaths per minute

ddd [48]

2.8M/(365x24x60)=wonder why you need this

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3 years ago

456+213 using the break apart strategy

GalinKa [24]

Fist break up each number in the hundreds column add the tens and the ones then add the hundreds to the previous answer

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4 years ago

38,477 rounded to the nearest thousand

Ganezh [65]

Answer: i'm pretty sure it's 38,500

Step-by-step explanation:

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3 years ago

If someone makes $650 a week, how much will they make in a<br> year?

Arlecino [84]

Answer:

they will make $33,800 in a year.

Step-by-step explanation:

there are 52 weeks in a year, so $650×5= $33,800

5 0

3 years ago

A test score of 48.4 on a test having a mean of 66 and a standard deviation of 11. Find the z-score corresponding to the given

Mariulka [41]

Answer:

A. -1.6; not significant

Step-by-step explanation:

The z-score of a data set that is normally distributed with a mean of $\bar x$ and a standard deviation of $\sigma$ , is given by:

$z=\frac{x-\bar x}{\sigma}$ .

From the question, the test score is: $x=48.4$ , the mean is $\bar x=66$ , and the standard deviation is $\sigma =11$ .

We just have to plug these values into the above formula to obtain:

$z=\frac{48.4-66}{11}$ .

This simplifies to: $z=\frac{-17.6}{11}$ .

$z=-1.6$ .

We can see that the z-score falls within two standard deviations of the mean.

Since $-2\le-1.6\le2$ the value is not significant.

The correct answer is A. -1.6; not significant

3 0

3 years ago