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expeople1 [14]
2 years ago
6

Hello! I really don't understand this question. Please answer it, it is due tomorrow! Also, please answer it in the most simple

way possible? Appreciate it! :)
Michelle and Michael checked some books out of the library. 20% of the books Michelle checked out were fiction books. Your friend thinks that Michael checked out more fiction books than Michelle. Explain the error in your friend's thinking. Use an example to support your reasoning.
Mathematics
1 answer:
borishaifa [10]2 years ago
6 0

Answer:

Just because Michelle checked out 20% of her borrowed books were fictions does not mean Michael had more books. For example, Michelle could have borrowed 100 books, which would result into her borrowing 20 fiction books while Michael could have borrowed just 1 fiction book with a 100% of his borrowed books being a fiction book.

Step-by-step explanation:

Just because Michelle checked out 20% of her borrowed books were fictions does not mean Michael had more books. For example, Michelle could have borrowed 100 books, which would result into her borrowing 20 fiction books while Michael could have borrowed just 1 fiction book with a 100% of his borrowed books being a fiction book.

In other words, percentage is just the simplied ratio of something. Percentage cannot account for the original value and its original value cannot be assumed that it is small just because the percentage is small.

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The editor of a textbook publishing company is deciding whether to publish a proposed textbook. Information on previous textbook
kogti [31]

Answer:

34.86% probability that it will be huge​ success

Step-by-step explanation:

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

Event A: Receiving a favorable review.

Event B: Being a huge success.

Information on previous textbooks published show that 20 % are huge​ successes

This means that P(B) = 0.2

99 % of the huge successes received favorable​ reviews

This means that P(A|B) = 0.99

Probability of receiving a favorable review:

20% are huge​ successes. Of those, 99% receive favorable reviews.

30% are modest​ successes. Of those, 70% receive favorable reviews.

30% break​ even. Of those, 40% receive favorable reviews.

20% are losers. Of those, 20% receive favorable reviews.

Then

P(A) = 0.2*0.99 + 0.3*0.7 + 0.3*0.4 + 0.2*0.2 = 0.568

Finally

P(B|A) = \frac{P(B)*P(A|B)}{P(A)} = \frac{0.2*0.99}{0.568} = 0.3486

34.86% probability that it will be huge​ success

4 0
3 years ago
Which condition must be satisfied in order to use the arc length formula L = the integral from a to b of sqrt(1 + f'(x)^2) dx?
ivanzaharov [21]
Looking through my old calc notes, I am reading that f(x) needs to be continuous on [a,b] and f ' (x) also needs to be continuous on [a,b]. Both conditions are needed. If you had to pick just one, then I'd say f(x) being continuous is much more important. Though I'm not 100% sure on this one. My thinking is that if there was any discontinuities on f(x), then the arc length would be distorted and overblown. The arc length should not account for any piece that isn't on the curve. 
6 0
3 years ago
Please help me *20 points*
Salsk061 [2.6K]

Answer:

36

Step-by-step explanation:

Frequency of less than 4:

6 + 4 + 8 = 18

Probability:

18/50 × 100 = 36%

5 0
3 years ago
Read 2 more answers
Write the word sentence as an inequality. Then solve the inequality.
Agata [3.3K]
The solution is x>18.

The problem tells us that 3 less than a number: x-3
is more than 15. >15
So the inequality is x-3>15. When we isolate x to simply the inequality, we add 3 to both sides, to get x>18. 

Please consider giving brainliest answer and a thanks to the answers you find more helpful! :)
4 0
3 years ago
Read 2 more answers
17. x^2 + 2x + 1
valentina_108 [34]

Answer:

E. This polynomial could be factored by using grouping or the perfect squares methods.

Step-by-step explanation:

x^2 + 2x + 1

There is no greatest common factor

This is a perfect square

a^2 + 2ab+ b^2 = ( x+1)^2

We can factor this  by grouping

x^2 + 2x + 1

(x^2 +x) + (x+1)

x( x+1)  + x+1

Factor out x+1

( x+1)  ( x+1)

This is not the difference of squares since there is no subtraction

5 0
3 years ago
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