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Gelneren [198K]
3 years ago
5

The mean height of women in a country​ (ages 20-29) is 64.3 inches. A random sample of 75 women in this age group is selected. W

hat is the probability that the mean height for the sample is greater than 65 ​inches? Assume sigma=2.81.
Mathematics
1 answer:
siniylev [52]3 years ago
3 0

Answer:

z(65) = (65-64.2)/[2.81/sqrt(60)] = 0.8/(0.3279)

Step-by-step explanation:

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This question is confusing to me please help..
lisabon 2012 [21]

Answer:

5

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there are 12 actors auditioning for 5 different roles in a new play. how many different cast are possible
aleksandr82 [10.1K]

Answer:

95,040 different cast are possible

Step-by-step explanation:

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3 years ago
A roped-off area of width x is created around a 30- by 10-foot rectangular museum display of Native American artifacts. The comb
Monica [59]

Answer: 4x^{2}+80x-500=0

Step-by-step explanation:

1. You know that:

-  The roped-off area whose width is represented with <em>x,</em> it is created around  a rectangular museum.

- The dimensions of the rectangular museum are: 30 ft by 10 ft.

- The combined area of the display and the roped-off area is 800 ft².

2. The area of the rectangular museum can be calculated with:

A=l*w

Where l is the lenght and w is the width.

You have that the lenght and the width in feet are:

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3. Let's call x the width of the roped-off area. Then, the combined area is:

A_c=l_c*w_c

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A_c=800

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w_c=w+x+x=10+2x

4. Substitute values and simplify. Then:

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800=300+60x+20x+4x^{2}\\4x^{2}+80x-500=0

5 0
3 years ago
HELP ASAP. Worth 10 points
finlep [7]

Answer:

They studied for a little more than an hour?

Step-by-step explanation:

7/12 of 60 Mins is 35 mins and 2/3 is 40 mins 40+35=75 mins

which is a little more than an hour, 15 mins more to be precise.

3 0
2 years ago
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