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Lady_Fox [76]
3 years ago
7

The endpoints of the diameter of a circle are at (1, 2) and (7, -6). What is the circumference of the circle to the nearest tent

h of a unit?
Mathematics
1 answer:
ololo11 [35]3 years ago
8 0

Answer: 62.8 Units.

Step-by-step explanation:

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25

Step-by-step explanation:

take the square root of 24^2+7^2

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(-2) + (3 - 7)<br> (-1) * (-2)
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Answer:

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Step-by-step explanation:

( - 2) + ( 3 - 7)

- 2 + (3 - 7)

- 2 +  - 4

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( - 1) \times ( - 2)

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A whole number is multiplied by six. What must the answer be?
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A track star runs two races on a certain day. The probability thathe wins the first race is 0.7, the probability that he wins th
NARA [144]

Answer:

a) 80% probability that he wins at least one race.

b) 30% probability that he wins exactly one race.

c) 20% probability that he wins neither race.

Step-by-step explanation:

We solve this problem building the Venn's diagram of these probabilities.

I am going to say that:

A is the probability that he wins the first race.

B is the probability that he wins the second race.

C is the probability that he does not win any of these races.

We have that:

A = a + (A \cap B)

In which a is the probability that he wins the first race but not the second and A \cap B is the probability that he wins both these races.

By the same logic, we have that:

B = b + (A \cap B)

The probability that he wins both races is 0.5.

This means that A \cap B = 0.5

The probability that he wins the second race is 0.6

This means that B = 0.6

B = b + (A \cap B)

0.6 = b + 0.5

b = 0.1

The probability that he wins the first race is 0.7.

This means that A = 0.6

A = a + (A \cap B)

0.7 = a + 0.5

a = 0.2

A) he wins at least one race.

This is

P = a + b + (A \cap B) = 0.2 + 0.1 + 0.5 = 0.8

There is an 80% probability that he wins at least one race.

B) he wins exactly one race.

This is

P = a + b = 0.2 + 0.1 = 0.3

There is a 30% probability that he wins exactly one race.

C) he wins neither race

Either he wins at least one race, or he wins neither. The sum of these probabilities is 100%.

From a), we have that there is an 80% probability that he wins at least one race.

So there is a 100-80 = 20% probability that he wins neither race.

6 0
3 years ago
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