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Komok [63]
2 years ago
12

Guys pls help with all the steps ​

Mathematics
1 answer:
Gwar [14]2 years ago
5 0

Step-by-step explanation:

To solve both questions you will have to use the Pythagoras theorem

{c}^{2}  =  {a}^{2}  +  {b}^{2}

c being the hypotenuse

so to find AB we say

{ap}^{2}  =  {pb}^{2}  +  {ab}^{2}

To make AB the subject of the formula, we take PB over. Therefore:

{ab}^{2}  =  {ap}^{2}  -  {pb}^{2}

now we just substitute

{ab}^{2}  =  {13}^{2}  -  {5}^{2}

{ab}^{2}  = 169 - 25

{ab}^{2}  = 144

square root both sides of the equation

ab = 12

We then use the same formula to find AQ(which is a hypotenuse)

{aq}^{2}  =  {ab}^{2}  +   {bq}^{2}

{aq}^{2}  =  {12}^{2}  +  {9}^{2}

{aq}^{2}  = 144 + 81

{aq}^{2}  = 225

square root both sides

aq = 15

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Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.5 feet and a standard deviation o
Mumz [18]

Answer:

0% probability that the mean of the sample taken is less than 2.2 feet.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean of 2.5 feet and a standard deviation of 0.2 feet.

This means that \mu = 2.5, \sigma = 0.2

Sample of 41

This means that n = 41, s = \frac{0.2}{\sqrt{41}}

Find the probability that the mean of the sample taken is less than 2.2 feet.

This is the p-value of Z when X = 2.2 So

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{2.2 - 2.5}{\frac{0.2}{\sqrt{41}}}

Z = -9.6

Z = -9.6 has a p-value of 0.

0% probability that the mean of the sample taken is less than 2.2 feet.

6 0
3 years ago
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Nata [24]

Answer:

4) 7,24,27

Step-by-step explanation:

8 0
3 years ago
5(20 + _ )= 100 + 85<br> I need help fast
kompoz [17]

Answer:

_ = 5

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Solve the inequality<br> <img src="https://tex.z-dn.net/?f=2%285c-7%29%5Cgeq%2010%28c-3%29" id="TexFormula1" title="2(5c-7)\geq
alina1380 [7]

1 Remove parentheses.

2(5c−7)≥c−3

2 Expand.
10c−14 ≥ c −3


3 Add 14 to both sides.
10c-14+14≥ c − 3+14


4 Simplify c−3+14 to c+11
10c≥c+11

5 Subtract c from both sides.

10c−c≥11

6 Simplify 10c−c to 9c
9c≥11

7 Divide both sides by 9.
c ≥11/9
​
​​
5 0
3 years ago
What principal will amount to $3000 if invested at 3% interest compounded
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Answer: $2227.41

Step-by-step explanation:

A = P(1 + r/n)^nt

4 0
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