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givi [52]
3 years ago
9

Please answer the 2 question l will mark as brainiest

Mathematics
2 answers:
Rama09 [41]3 years ago
7 0

Answer:

1. 66.48

2. 12.57

Step-by-step explanation:

Formula is A = ㅠr^2

The radius is that half line :))

N76 [4]3 years ago
3 0

Answer:

1. A=πr2=π·4.62≈66.4761

A≈66.48

2. A=πr2=π·22≈12.56637

A≈12.57

please mark as brainiest

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A 13 card hand is dealt from a well-shuffled standard 52-card deck. What is the probability that 4 red cards and 9 black cards a
GaryK [48]

The probability that 4 red cards and 9 black cards are dealt is 0.0735.

Let E be the event that 4 red cards and 9 black cards are dealt.

According to the given question.

Number of card hand that is dealt from a well-shuffled standard 52- card deck is 13

Total number of red cards in a well shuffled card deck = 26

Total number of black cards in a well shuffled card = 26

Now, the number of ways to dealt 13 cards = ^{52} C_{13}

Number of ways to dealt 9 black cards = ^{26}C_{9}

And, the number of ways to dealt 4 red cards = ^{26} C_{4}

As, we know that the probability of an event is calculated by taking the ratio of the favorable outcomes to the total number of outcomes.

Therefore, the the probability that 4 red cards and 9 black cards are dealt is given by

P(E) = \frac{^{26}C_{9}\times \ ^{26}C_{4}    }{^{52}C_{13}  }

⇒ P(E) = \frac{\frac{26!26!}{9!4!17!22!} }{\frac{52!}{13!39!} }

⇒ P(E) = 0.0735

Hence, the probability that 4 red cards and 9 black cards are dealt is 0.0735.

Find out more information about probability here:

brainly.com/question/14530583

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3 0
2 years ago
What is the rate unit of running 4 laps in one minute?
kirill115 [55]

Answer:

laps per minute

Step-by-step explanation

because it is asking you to find the unit of laps per minute.

5 0
2 years ago
In a class the ratio of boys to girls is 4:3 30% of the boys are left handed.
alex41 [277]
3/10 or 30/100 are left handed boys bc that is 30% converted into a fraction
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3 years ago
A circle has a diameter with endpoints at –2 + i and –6 –11i. What is the center of the circle?
kotykmax [81]
Be more specific. Like what is it asking you to do ? I'm trying to help. :)
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4 years ago
10 points, need these answers filled in!
Ksju [112]

Answer:


Step-by-step explanation:

a) If events A and B are independent we have

P(A/B) =P(A)

But here P(A/B) = 0.8 and P(A)=0.2

Hence A and B are not independent.

b) If events A and B are independent we have

P(A/B) =P(A)

But here P(A/B) = 0.6 and P(A)=0.3

Hence A and B are not independent.

c) If events A and B are independent we have


P(A/B) =P(A)

Jere P(A/B) = 0.5 and P(A)=0.5

Hence A and B are  independent.

4 0
4 years ago
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