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Nataly [62]
3 years ago
5

Picture attached below. Please help.

Mathematics
2 answers:
marin [14]3 years ago
8 0
What’s the picture? You didn’t put one I wish to Help ya.
Anuta_ua [19.1K]3 years ago
4 0

There isnt a picturee but when you add another question I will hep you the best I can :)

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The heights of 18-year-old men are approximately normally distributed with mean 68 inches and standard deviation 3 inches. What
Nutka1998 [239]

Answer:

The probability that an 18-year-old man selected at random is greater than 65 inches tall is 0.8413.

Step-by-step explanation:

We are given that the heights of 18-year-old men are approximately normally distributed with mean 68 inches and a standard deviation of 3 inches.

Let X = <u><em>heights of 18-year-old men.</em></u>

So, X ~ Normal(\mu=68,\sigma^{2} =3^{2})

The z-score probability distribution for the normal distribution is given by;

                              Z  =  \frac{X-\mu}{\sigma}  ~ N(0,1)

where, \mu = mean height = 68 inches

           \sigma = standard deviation = 3 inches

Now, the probability that an 18-year-old man selected at random is greater than 65 inches tall is given by = P(X > 65 inches)

       P(X > 65 inches) = P( \frac{X-\mu}{\sigma} > \frac{65-68}{3} ) = P(Z > -1) = P(Z < 1)

                                                                = <u>0.8413</u>

The above probability is calculated by looking at the value of x = 1 in the z table which has an area of 0.8413.

6 0
3 years ago
In one year Megan spent 359.94 on her gym membership at the same monthly rate of 59.99. Write an equation to represent this situ
Thepotemich [5.8K]

Answer:

359.94 = 59.99 * X

Step-by-step explanation:

The situation is determined by the following equation:

T = M * X

Being M the monthly value, that is to say 59.99

T the total value, that is 359.94

And X would be the number of months, and at the same time the variable.

In this case it would be like this:

359.94 = 59.99 * X

If we solve for X, we are left with:

X = 359.94 / 59.99

X = 6

That is to say that Megan went to the gym for 6 months of the year

7 0
3 years ago
Divide the difference between 70 and 20 by 25.
pentagon [3]

Answer:

The Answer is 2

Step-by-step explanation:

70 - 20= 50 and if you divide by 25 you get 2. Because 25 times 2 = 50 hope it helps

5 0
3 years ago
Read 2 more answers
What is the standard deviation of the data set given below?<br> 4,7, 8, 9, 12
larisa [96]

Answer:

I think 7

Step-by-step explanation:

4 , 8 , 9 and 12 has factors.

7 has no factor.

4= 2×2

8= 2×4

9= 3×3

12= 3×4

3 0
3 years ago
Goods bought for $800 had to be sold off at a loss of 8% the selling price was​
Vikentia [17]

Answer:

8% of 800 is 64

800-64=736

Step-by-step explanation:

4 0
3 years ago
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