4 years ago

Find the circumference and the area of a circle with diameter 7 cm

Mathematics

1 answer:

zepelin [54]4 years ago

3 0

Circumference formula: diamter*pi=7pi
Area = pi*r^2=pi(3.5)^2=12.25pi.

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crimeas [40]

8x = 13

13 divided by 8

that would be 1.625

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3 years ago

What is the value of the expression 3÷3/4

madam [21]

Answer:

1/4

Step-by-step explanation:

3 divided by 3 is 1, 1 divided by 1 is just a fraction or .25

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3 years ago

Find x. 1.5 2 <img src="https://tex.z-dn.net/?f=%5Csqrt%7B3%7D" id="TexFormula1" title="\sqrt{3}" alt="\

Vanyuwa [196]

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Step-by-step explanation:

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3 years ago

Find the value of x. Please help

inna [77]

I guess this is the answer
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3 years ago

According to the Stack Overflow Developers Survey of 20184, 25.8% of developers are students.The probability that a developer is

murzikaleks [220]

Answer:

0.0326 = 3.26% probability that she is a student.

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: Woman developer

Event B: Student

Probability that the developer is a woman:

7.4% of 25.8%(students).

76.4% of 100 - 25.8 = 74.2%(not students). So

$P(A) = 0.074*0.258 + 0.764*0.742 = 0.58598$

Student and woman developer.

7.4% of 25.8%(students), so

$P(A \cap B) = 0.074*0.258 = 0.019092$

If we encounter a woman developer, what is the probability that she is a student

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.019092}{0.58598} = 0.0326$

0.0326 = 3.26% probability that she is a student.

5 0

3 years ago