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Gelneren [198K]
4 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]4 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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a man is pulling a rope attached to a rock on a sloped road, exerting 200 pounds of force on the rope . If he is pulling at an a
adell [148]

For a better understanding of the answer please find the diagram in the attachment.

As can be clearly seen from the diagram that the distance, "d" (shown in dark blue) of 100 feet which is covered on the sloped/inclined road is actually making an angle of only 30 degrees with the force of 200 pounds which is being applied on the road. That angle of 30 degrees is what matters.

So, the force, F=200 pounds

distance, d=100 feet

And the angle between the force, F and the distance, d is: \theta=30^{\circ}

Therefore, as per formula, the work, W, done will be:

W=F\times d\times cos(\theta)

This, when applied to the question we have will give us:

W=200\times 100\times cos(30^{\circ})\approx17320.51 lb-ft

4 0
3 years ago
Question 2
Llana [10]

Hi here are the answers:)

Part A:

x = 3

Part B:

A = (3, 2)

Part C:

You can find the vertex by finding the mid-point of the focus and directrix. So the vertex is (-1, 2)

Part D:

The parabola opens left. This is because the parabola always opens toward the focus.

Part E:

The value of p is the distance from the focus to the vertex or the vertex to the directrix. To find p you can minus x-coordinate of focus with x-coordinate of the directrix, then divide it by 2. So this will be: -5-2/2 = -4

Part F:

p = -4

Part G:

x=\frac{1}{4*-4}(y-2)^{2}-1

Part H: image is attached down below. Fyi the C should be V (vertex)

Part I:

x=\frac{1}{16} (y-2)^{2}-1

*I'm not really sure about this one*

Part J:

1. x = 1/4 (y-3)>2+3

2. x = 1/12 (y +1)>2 +5

*I'm not really sure about this one either srry:(*

Hope this helped bai bye.

8 0
3 years ago
Help meeeeeeeeeeeeeeee
icang [17]

Answer:

If the earth didn't have a tilt, then we would only have one season which would most likely correspond to spring or autum.

Step-by-step explanation:

We would also expirience a mini summer when the earth is closest to the sun and we would expeirience a mini winter when the earth is farthest from the sun. Every where on the Earth would have a 12 hour sunlight days. It would still be warm at the equator and cold at the poles.

[I hope this answered your question ᓚᘏᗢ]

5 0
2 years ago
Read 2 more answers
G(x)=4+3(x-1), evaluate for g(6)
Paladinen [302]

Answer:

g(x) = 19

Step-by-step explanation:

y = 4 + 3 (6-1)

y = 4 + 15

y = 19

4 0
3 years ago
help plz The total cost of a shirt and a jacket was $99.34. If the price of the shirt was $7.76 less than the jacket, what was t
GalinKa [24]

Answer: Shirt costs $45.79

Step-by-step explanation:

jacket- x

shirt (x-7.76)

x+x-7.76=99.34

2x - 7.76 = 99.34

2x = 107.10

x=53.55

Jacket costs 53.55 and Shirt costs 53.55-7.76= 45.79

6 0
3 years ago
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