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3 years ago

In the image, point A marks the center of the circle. Which two lengths must form a ratio of 1 : 2?

Mathematics

2 answers:

Ksivusya [100]3 years ago

5 0

Answer:

the answer is D

Step-by-step explanation:

Alex787 [66]3 years ago

3 0

Answer: AI:EF

Step-by-step explanation:

1. By definition, the diameter of a circle is twice the radius, then:

D=2r

Where D is the diameter and r is the radius:

2. The AI is the lenght of the radius of the circle and EF is the length of the diameter of the circle. Keeping this on mind you have:

$\frac{AI}{EF}=\frac{r}{D}=\frac{r}{2r}=\frac{1}{2}$ or 1:2

3. Then, AI and EF form the ratio:

1:2

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Butoxors [25]

$\bf 5\times \cfrac{4}{7}\implies \cfrac{5\cdot 4}{7}\implies \cfrac{20}{7}\implies \cfrac{14+6}{7}\implies \cfrac{14}{7}+\cfrac{6}{7}\implies 2+\cfrac{6}{7}\implies 2\frac{6}{7}$

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3 years ago

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Assume you are planning a picnic for lunch, but when you woke up there were rain clouds in the sky. If 50% of rainy days start w

Tasya [4]

Answer:

0.25 = 25% probability that it will rain today and ruin your picnic

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: Cloudy skies

Event B: Rain

20% of all days start with clouds in the air

This means that $P(A) = 0.2$

50% of rainy days start with rain clouds in the air

50% of 10%. So

$P(A \cap B) = 0.5*0.1 = 0.05$

What is the probability that it will rain today and ruin your picnic

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.05}{0.2} = 0.25$

0.25 = 25% probability that it will rain today and ruin your picnic

3 0

3 years ago

An animal shelter has 36 kittens and 12 puppies available for adoption. What is ration of puppies to kittens?

mestny [16]

The answer is 12:36 which reduces to 1:3

4 0

3 years ago

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Which one should is the correct one?

Kamila [148]

Answer:

h = 5

Step-by-step explanation:

3 0

3 years ago

Which expression is equivalent to x^4 - 12x^2 + 36?

QveST [7]

So the answer is
(x^2 plus or minus 6)(x^2 plus or minus 6)
an easy way to do this is to only look at plus or minus 6
x^4 - 12x^2 + 36 (-12 and 36)

6 x 6 = 36
6 + 6 ≠ -12 (x^2 + 6)(x^2 + 6) is incorrect

6 x -6 ≠ 36
6 + -6 ≠ -12 (x^2 - 6)(x^2 + 6) is incorrect

-6 x -6 = 36
-6 + -6 = -12 (x^2 - 6)(x^2 - 6) is correct

the answer is (1)

3 0

3 years ago

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