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GuDViN [60]
3 years ago
5

I need answer for a and b show your work

Mathematics
1 answer:
Stels [109]3 years ago
7 0
I have two methods for you

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The formula for the circumference of a circle is C = 2pi . Determine the circumference when the radius r is 10 cm. A. 100 approx
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Answer:b

Step-by-step explanation:

Circumference, C = 2pi×r

=2×pi×10

= 20pi cm

8 0
3 years ago
Seventy-five percent of the light aircraft that disappear while in flight in a certain country are subsequently discovered. Of t
Elanso [62]

Answer:

0.05 = 5% probability that it will not be discovered

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

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

In which

P(B|A) is the probability of event B happening, given that A happened.

P(A \cap B) is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Has an emergency locator

Event B: Not discovered

Probability of having an emergency locator:

70% of 75%(discovered).

100 - 89 = 11% of 100 - 75 = 25%(not discovered). So

P(A) = 0.7*0.75 + 0.11*0.25 = 0.5525

Intersection of events A and B

Having an emergency locator and not discovered, so 11% of 25%

P(A \cap B) = 0.11*0.25 = 0.0275

What is the probability that it will not be discovered?

P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.0275}{0.5525} = 0.05

0.05 = 5% probability that it will not be discovered

5 0
3 years ago
What is ​ 12 5/25 ​ as a mixed number in simplest form?
creativ13 [48]
12 5/25 as a simplified mixed number would be 12 1/5
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Fernando took the train due south from the airport, heading to the end of the line. At the
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Step-by-step explanation:

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6 0
3 years ago
Rewrite each expression using I
san4es73 [151]
Just so you know, it has to be written as a lowercase i to represent an imaginary number.

a) 2i
The square root of 4 is 2, the negative under the square root is what makes it imaginary

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c) 5 + (5i times the square root of 2)

d) 3 - (i times the square root of 2)
7 0
3 years ago
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