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Nitella [24]
3 years ago
9

There are 3 boys for every 2 girls in a dance competition. Does it make sense for there to be a total of 9 people in the competi

tion? Explain.
Mathematics
2 answers:
rjkz [21]3 years ago
6 0

Answer:

Yes

Step-by-step explanation:

3:2 = 5 people

3:1 = 4 people

5+4=9 people

dimulka [17.4K]3 years ago
3 0
3:2=5
so girls are 2:5
set up the proportion
2/5=x/9
5x=18
x=3.6 girls; doesn’t work so no!

another way you can look at it is because there are 3 boys for every 2 girls, add 2 more girls, you’ll get 3 more boys
that makes the total of 10 people so 9 is impossible
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Step-by-step explanation:

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5 0
3 years ago
What is the relationship between gross pay and net pay? A. Gross pay is less than net pay B. Gross pay is more than net pay C. G
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Step-by-step explanation:

7 0
3 years ago
Are you smarter than a second grader? A random sample of 60 second graders in a certain school district are given a standardized
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Answer:

We accept H₀ , we do not have enought evidence for rejecting H₀

Step-by-step explanation:

Normal Distribution

sample size   n  =   60

standard deviation     σ  =  15

1.Hypothesis Test : Is a one tailed-test on the right

H₀      null hypothesis             μ₀  = 50

Hₐ    alternative hypothesis   μ₀  > 50

2.-We will do the test for  a significance level   α =  0,01 tht means for a 99% interval of confidence

then z(c)  =  2.32

3.- We compute z(s)  

z(s)  =  [ ( μ - μ₀ ) /( σ/√n )       ⇒  z(s)  =  (  2 * √60 ) / 15

z(s)  = 15.49/15                        ⇒   z(s)  = 1.033

4.- We compare values of  z(c)   and z(s)

z(s)  <  z(c)      1.033 < 2.32

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6 0
3 years ago
The population of a town grows at a rate proportional to the population present at time t. The initial population of 500 increas
Mazyrski [523]

Answer:

The population in 40 years will be 1220.

Step-by-step explanation:

The population of a town grows at a rate proportional to the population present at time t.

This means that:

P(t) = P(0)e^{rt}

In which P(t) is the population after t years, P(0) is the initial population and r is the growth rate.

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This means that P(0) = 500, P(10) = 1.25*500 = 625

We apply this to the equation and find t.

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r = \frac{\ln{1.25}}{10}

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So

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What will be the population in 40 years

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P(t) = 500e^{0.0223t}

P(40) = 500e^{0.0223*40} = 1220

The population in 40 years will be 1220.

7 0
3 years ago
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