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vaieri [72.5K]
2 years ago
9

A square with a perimeter of 14 in. is reduced to a square with a perimeter of 7 in. What is the scale factor of this reduction?

​
PLASE SHOW YOUR WORK
WILL GIVE BRAINLIEST
Mathematics
1 answer:
DiKsa [7]2 years ago
3 0

Answer:

So scale factor, I'm either thinking multiplication or division, so here goes:

Step-by-step explanation:

So either division or multiplication is my guess.

We all know 7x2=14, so 14 divided by 7 is 2.

Now let's start a little easy for multiplication; 10x7, easy, 70.

7x4, easy, 28. 70+28= 98 now. So basically 14x7 is 98.

I remember the phrase scale factor from 7th grade.

So try to put the answer that is multiplied (98).

And if that doesn't work, try the divided version (2), vice versa.

Please correct me if I'm wrong, I took time out of my lunch break to write this lol.

Bye!

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Answer:

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Step-by-step explanation:

Let a set be events that have occurred be denoted as:

S = {A₁, A₂, A₃,..., Aₙ}

The Bayes' theorem states that the conditional probability of an event, say <em>A</em>ₙ given that another event, say <em>X</em> has already occurred is given by:

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Denote the events as follows:

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The information provided is:

P(B) = 0.0312\\P(+|B)=0.81\\P(+|B^{c})=0.92

Compute the value of P (B|+) using the Bayes' theorem as follows:

P(B|+)=\frac{P(+|B)P(B)}{P(+|B)P(B)+P(+|B^{c})P(B^{c})}

            =\frac{(0.81\times 0.0312)}{(0.81\times 0.0312)+(0.92\times (1-0.0312)}\\

            =\frac{0.025272}{0.025272+0.891296}

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Thus, the probability that a woman in her 60s has breast cancer given that she gets a positive mammogram is 0.0276.

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