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emmainna [20.7K]
3 years ago
12

HELP ME ASAP!!! Why is this wrong?

Mathematics
1 answer:
Doss [256]3 years ago
6 0

Answer:

B

Step-by-step explanation:

The point (3, - 4) is in the fourth quadrant where cos Θ > 0

Thus

cos Θ = \frac{3}{5} → B

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A city has a population of 2.8 million people. 45% of the population are male. How many females live in the city?
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<em>Sol</em><em>ution</em><em>,</em>

<em>Total</em><em> </em><em>po</em><em>pulation</em><em>:</em><em>2</em><em>8</em><em>0</em><em>0</em><em>0</em><em>0</em><em>0</em>

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6 0
3 years ago
Eddie opens a bank account with $1,000. Every year he doubles the amount of money in the account.
Sveta_85 [38]

Answer:

next year he'll add $2,000. to the bank account. the total amount would be <u>$3,000.00</u>

Step-by-step explanation:

$1,000.00 x 2 = $2,000.00 + $1,000.00 = $3,000.00

^w^

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3 years ago
Meat costs $8.00 per pound at a store. What is the slope?
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Answer:

The slope is 8.

Step-by-step explanation:

If you were to graph the price of meat per pound, you would need to choose the x-axis and y-axis labels.

The x-axis is the <u>independent</u> variable, meat in pounds.

The y-axis is the <u>dependent</u> variable, price in dollars.

The price depends on the number of pounds you buy.

Slope is calculated using rise over run, or:

m = \frac{rise}{run}

"Rise" is the number of squares going up.

"Run" is the number of squares going to the right.

In the graph below, <u>to go from one red dot to the next, you count 1 to the right and 8 going up</u>.

m = \frac{rise}{run}

m = \frac{8}{1}

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8 0
3 years ago
Read 2 more answers
A cab charges the following fare for each trip.
trasher [3.6K]

Answer:

$9.78

Let's be honest, you only need an answer right?

6 0
3 years ago
4. Amazon executives believe that at least 70% of customers would return a product 2 days after it arrives at their home. A samp
inysia [295]

Using the <u>normal distribution and the central limit theorem</u>, it is found that there is a 0.1635 = 16.35% probability of a sample result with 68% or fewer returns prior to the third day.

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

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

  • It 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, which is the percentile of X.
  • By the Central Limit Theorem, for a proportion p in a sample of size n, the sampling distribution of sample proportions has mean \mu = p and standard error s = \sqrt{\frac{p(1 - p)}{n}}

In this problem:

  • Sample of 500 customers, hence n = 500.
  • Amazon believes that the proportion is of 70%, hence p = 0.7

The <u>mean and the standard error</u> are given by:

\mu = p = 0.7

s = \sqrt{\frac{p(1 - p)}{n}} = \sqrt{\frac{0.7(0.3)}{500}} = 0.0205

The probability is the <u>p-value of Z when X = 0.68</u>, hence:

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

By the Central Limit Theorem

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

Z = \frac{0.68 - 0.7}{0.0205}

Z = -0.98

Z = -0.98 has a p-value of 0.1635.

0.1635 = 16.35% probability of a sample result with 68% or fewer returns prior to the third day.

A similar problem is given at brainly.com/question/25735688

7 0
2 years ago
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