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3 years ago

15

Can anyone help me find the answer to this question?

1 answer:

galina1969 [7]3 years ago

3 0

Find a 92.9% confidence interval for the difference p1−p2p1−p2 of the population proportions.

Hint: For a level of confidence (1−α)⋅100%(1−α)⋅100%, z∗z∗ is the value that leaves an area of (1−α)/2(1−α)/2 to its right in a standard normal distribution

I hope that helps

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-7 - -3 HELP PLEASE!!!!!!!!!!!!!!!

True [87]

Answer is -10

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Hehe

7 0

3 years ago

The diagram shows two vertical masts, AB and CD, on horizontal ground. The height of AB is 500m and the height of CD is 350m. Th

Zina [86]

<u>Given</u>:

The lines AB and CD, on horizontal ground.

The height of AB is 500 m.

The height of CD is 350 m.

The angle of elevation of B from D is 30°

We need to determine the distance AC.

<u>Length of BE:</u>

Let us construct a line that is parallel to AC.

Let the line be ED.

The length of BE is given by

$BE=AB-AE$

$BE=500-350$

$BE=150$

Thus, the length of BE is 150 m

<u>Length of ED:</u>

The length of ED can be determined using the trigonometric ratio.

Thus, we have;

$tan \ 30^{\circ}=\frac{ED}{BE}$

Substituting the values, we get;

$\frac{\sqrt{3}}{3}=\frac{ED}{150}$

$\frac{\sqrt{3}}{3}\times 150=ED$

$50\sqrt{3}=ED$

Thus, the length of ED is 50√3 m

<u>Length of AC:</u>

From the figure, it is obvious that the sides ED and AC have the equal length.

Thus, we have;

AC = ED = 50√3

Simplifying, we get;

$AC=50 \times 1.732$

$AC=86.6 \ m$

Hence, the length of AC is 86.6 m

5 0

3 years ago

If the volume of the cone is 180 in³, what is its surface area?

3241004551 [841]

Answer:

Hi, to find the surface area of a cone is πrl

if your radius and length is given.

hope this helps (•‿•)

3 0

2 years ago

Abril and her dad bought ice cream after the trip. They found two different

anyanavicka [17]

Chocolate Chip: $20
Cherry Vanilla:$18.29

7 0

3 years ago

ASAP HELP SOMEONE! PLEASE

Leviafan [203]

The probability for rolling a sum of 7 is: 1/6

Step-by-step explanation:

Given that two six-sided dies are rolled the total outcomes will be:

$6*6 =36$

n(S) = 36

Out of total outcomes we have to count the outcomes that sum up to 7

Let A be the event that the sum of outcomes is 7

$A = \{(1,6), (2,5), (3,4) , (4,3) , (5,2), (6,1)\}$

Here the first number is the result of first die and second number is the result of 2nd die.

n(A) = 6

So the probability of A will be:

$P(A) = \frac{n(A)}{n(S)}\\\\=\frac{6}{36}\\\\=\frac{1}{6}$

Hence,

The probability for rolling a sum of 7 is: 1/6

Keywords: Probability, sample space

Learn more about probability at:

#LearnwithBrainly

7 0

3 years ago