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dlinn [17]
3 years ago
15

Some species of hummingbirds appear to hover in mid-air by flapping their tiny wings 80 times per second. How many times per min

ute do hummingbirds flap their wings?
Mathematics
1 answer:
astraxan [27]3 years ago
3 0
So the way to answer this question is to convert minute to seconds
We know that a minute has 60 seconds
The problem states that the hummingbird flaps its wings 80 times per second
So 80 times per second x 60 seconds = 4800 times would be the final answer.
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A family has two children. When asked if he has at least one daughter named Ann, the fatherreplies, "Yes." What is the probabili
Leviafan [203]

Answer:

33.3% probability that both children are girls, if we know that the family has at least one daughter named Ann.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The family has two children.

The sample space, that is, the genders of the children may be divided in the following way, in which b means boy and g means girl.

b - b

b - g

g - b

g - g

We know that they have at least one girl. So the sample space is:

b - g

g - b

g - g

What is the probability that both children are girls, if we know that the family has at least one daughter named Ann?

Desired outcomes:

Both children being girls, so

g - g

1 desired outcome

Total outcomes

b - g

g - b

g - g

3 total outcomes

Probability

1/3 = 0.333

33.3% probability that both children are girls, if we know that the family has at least one daughter named Ann.

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Harrizon [31]

Answer:

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Step-by-step explanation:

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a drink is made by mixing pineapple juice orange juice and lime juice in the ratio 2:7:3 Sally makes 600ml of the fruit drink ho
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Pineapple juice : orange juice : lime juice = 2:7:3
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