All categories

3 years ago

Marianne is 15 years old and her brother is 5 years old; is the relationship between their ages proportional?

Mathematics

1 answer:

cricket20 [7]3 years ago

4 0

Answer:

The ratio is 15:5 or 3:1. If Marianne is 3 years old, her brother is 1. And it is proportional...

Step-by-step explanation:

You might be interested in

3x-6y=6 in function notation

JulijaS [17]

Subtract 3x from both sides:

-6y = -3x + 6

divide both sides by -6 to get y by itself:

y = 1/2x - 1

function notation is rewriting y as a function:

f(x) = 1/2x -1

3 0

3 years ago

b. Find a 99% confidence interval for mean age of ICU patients using the facts that, in the sample, the mean is 57.55 years and

rjkz [21]

Answer:

99% of confidence intervals for mean age of ICU patients

(53.8920 , 61.2079)

Step-by-step explanation:

Explanation:-

Given sample mean $x^{-} = 57.55$

Given standard error is determined by

S.E = $\frac{S.D}{\sqrt{n} }$

Given data standard error = 1.42

99% of confidence intervals for mean is determined by

$(x^{-} - Z_{0.01} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.01} \frac{S.D}{\sqrt{n} } )$

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.01}{2} } = Z_{0.05} = 2.576$

$(x^{-} - 2.576 S.E , x^{-} + 2.576 S.E)$

$(57.55 - 2.576X 1.42 , 57.55+ 2.576 X1.42)$

(53.8920 , 61.2079)

Conclusion:-

99% of confidence intervals for mean is determined by

(53.8920 , 61.2079)

5 0

3 years ago

20 points...

Ierofanga [76]

Answer:

The world human population has a natural growth rate (r) of approximately 2 percent per year.

Step-by-step explanation:

3 0

3 years ago

I need help with this question. Please help!!!

Inessa05 [86]

Answer:

area: 8064units perimeter: 30units

Step-by-step explanation:

6 0

3 years ago

Based on a sample survey, a company claims tha 80% of their customers are satisfied with their products. out of 350 customers, h

sesenic [268]

Answer:

280 customers

Step-by-step explanation:

80% of 350 is 280

4 0

2 years ago