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2 years ago

The values of w is inversely proportional to m .if w=8 then m=25; what is m when w=20?

Mathematics

1 answer:

iren2701 [21]2 years ago

3 0

Answer:

m = 10

Step-by-step explanation:

Given w is inversely proportional to m then the equation relating them is

w = $\frac{k}{m}$ ← k is the constant of variation

To find k use the condition w = 8, m = 25 , then

8 = $\frac{k}{25}$ ( multiply both sides by 25 )

200 = k

w = $\frac{200}{m}$ ← equation of variation

When w = 20 , then

20 = $\frac{200}{m}$ ( multiply both sides by m )

20m = 200 ( divide both sides by 20 )

m = 10

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Answer:

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c) 0.15% of people has an IQ score greater than 136

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

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95% of the measures are within 2 standard deviation of the mean.

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In this problem, we have that:

Mean = 100

Standard deviation = 12

(a) What percentage of people has an IQ score between 76 and 124? 

76 = 100 - 2*12

124 = 100 + 2*12

So within 2 standard deviations of the mean, and the percentage is 95%.

(b) What percentage of people has an IQ score less than 64 or greater than 136?

64 = 100 - 3*12

136 = 100 + 3*12

99.7% of people has scores between 64 and 136. So 100 - 99.7 = 0.3% of people has an IQ score less than 64 or greater than 136.

(c) What percentage of people has an IQ score greater than 136?

0.3% of people has an IQ score less than 64 or greater than 136.

Since the normal distribution is symmetric, 0.3%/2 = 0.15% are below 64 are 0.15% are above 136.

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2 years ago

Wrong Answer I report You And You Don't Get Your Points

Nadusha1986 [10]

1. Joe- 2+b (or 2+1b)

Micheal- 2b

2. Joe- 2+10=12

Micheal- 2x10=20

3. one distributes and the other just adds regularly.

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2 years ago

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Answer:

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Step-by-step explanation:

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