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2 years ago

9

If a fish is swimming 20 feet below the surface of the ocean and a bird flying directly overhead of the fish is 12 feet above th

e surface, how far apart are they?

1 answer:

kow [346]2 years ago

7 0

Answer:

32 feet

Step-by-step explanation:

The equation would be 12 - (-20)

12 + 20 = 32

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A credit card company decides to study the frequency with which its cardholders charge for items from a certain change of retail

gregori [183]

Answer:

15.87% of the total number of cardholder would be expected to be charging 27 or more in the study.

Step-by-step explanation:

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.

Mean of 25 charged purchases and a standard distribution of 2

This means that $\mu = 25, \sigma = 2$

Proportion above 27

1 subtracted by the pvalue of Z when X = 27. So

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

$Z = \frac{27 - 25}{2}$

$Z = 1$

$Z = 1$ has a pvalue of 0.8413

1 - 0.8413 = 0.1587

Out of the total number of cardholders about how many would you expect are charging 27 or more in the study?

0.1587*100% = 15.87%

15.87% of the total number of cardholder would be expected to be charging 27 or more in the study.

6 0

2 years ago

in 2010, the price of a laser printer was $1599. in 2018, the price of the same type of printer had dropped to $579. find the pe

uysha [10]

Hi there!

nearest percentage=64%

<em><u>1.Subtract starting value and final value:</u></em>

<em><u /></em> $1599-579=1020$ <em><u /></em>

<em><u>2.Divide it by the starting value:</u></em>

<em><u /></em> $1020*1599= 0.6378986866791744840525328330206378986$ <em><u /></em>

<em><u>3.Multiply the term by 100:</u></em>

<em><u /></em> $0.6378986866791744840525328330206378986$ <em><u>·</u></em> $100= 63.78986866791744840525328330206378986$ <em><u /></em>

<em><u>4.Round the term:</u></em>

<em><u /></em> $63.78986866791744840525328330206378986=64$ <em><u /></em>

Therefore, the decrease of the total 8 years was 64%.

<em><u /></em>

5 0

2 years ago

Read 2 more answers

Last year, the school library had a total of x books. Over the summer, the library acquired another 35 books and now has a total

ki77a [65]

Answer:

the equation is x= 2908

Step-by-step explanation:

you need to find the number of books they had by taking the new total and subtract it by the number they add and that would equal x in the problem

6 0

2 years ago

Tri City sells four times as many dishwashers as Solly Company. The difference between their sales is 96 dishwashers. How many d

kondaur [170]

We use a system of equations to solve this. Since tri city sells 4 times it becomes 4x and solly company is x. Then we do 4x-x=96. 3x=96. x=32. We are not finished yet. We still have to multiply x by 4. x=128. Tri City sold 128 dishwashers.

3 0

3 years ago

10.) Which equation below represents the model? A. m - 11 = 43 B. 11m = 43 C. m + 11 = 43 D. m + 43 = 11.) What is the value of

elixir [45]

Answer:

A

Step-by-step explanation:

m - 11 = 43

3 0

2 years ago