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3 years ago

6000 out of the 20000 runners in a marathon were women. What percentage of the runners were women?

Mathematics

2 answers:

mylen [45]3 years ago

7 0

Answer:

30%

Step-by-step explanation:

..........?!&÷&!&!

Leto [7]3 years ago

5 0

Answer:

%30

6,000 out of the 20,000 runners is %30

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Assume that the weight of two year old babies have distribution that is approximately normal with a mean of 29 pounds and a stan

Lana71 [14]

Answer:

25.15 ponds is the weight of two year old baby corresponds to 10th percentile.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 29 pounds

Standard Deviation, σ = 3 pounds

We are given that the distribution of weight of two year old babies is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.10

P(X < x)

$P( X < x) = P( z < \displaystyle\frac{x - 29}{3})=0.10$

Calculation the value from standard normal z table, we have,

$P(z < -1.282) = 0.10$

$\displaystyle\dfrac{x - 29}{3} = -1.282\\x = 25.154 \approx 25.15$

Thus, 25.15 ponds is the weight of two year old baby corresponds to 10th percentile.

5 0

3 years ago

I have 56 dollars in my bank account. I deposit 42 dollars into my account. Then I withdraw 10 dollars. How much money do I have

Artist 52 [7]

Answer:

I have left $88

Step-by-step explanation:

Step two:

Given data

Initial amount= $56

deposited amount= $42

The balance after deposit will be= 56+42

=$98

Step two:

If I withdraw 10 dollars

The new balance will be

=98-10

=$88

Hence I have left $88

3 0

2 years ago

Bruce wants to make 50 ml of an alcohol solution with a 12% concentration. He has a 10% alcohol solution and a 15% alcohol solut

Inessa05 [86]

The equation is 0.1x + 0.15(50-x)=1.20(50)

Step-by-step explanation:

Here you need 50ml of 12% alcohol solution.

You have 10% and 15% alcohol solutions.

Take volume of 10% alcohol solution to be x ml

Take volume of 15% alcohol solution to be y ml

Form equations;

x+y=50 ml--------------------------equation 1

0.1x +0.15 y= 12% of 50

0.1x+0.15y=6-----------------------equation 2

Now you have simultaneous equations, use a graph tool to solve for values of x and y as attached.

or use the mixture equation the get value of x

0.1x + 0.15(50-x)=1.20(50)

The values of x and y are ;

(x,y) (30,20) which means;

y is 20 ml of 15% alcohol

x is 30 ml of 10% alcohol

Learn More

brainly.com/question/2405496

Keywords : concentration, mixture

#LearnwithBrainly

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3 years ago

i have a math questoin so she will lead you in it now the math questoin is "steven is doing his homework.What time is it? Use A.

yawa3891 [41]

P.M is the time you do homework because you do it after school

Pls mark me BRAINLIEST pls pls pls pls

5 0

3 years ago

a sack of potatoes weighs 14 pound 9 ounces. after wendy makes potato salad for a picnis, the sack weighs 9 pounds 14 ounces. wh

olganol [36]

14 pounds 9 ounces = 233 ounces
9 pounds 14 ounces = 158 ounces

233-158=75 ounces=4 pounds 11 ounces

4 0

3 years ago

Read 2 more answers