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2 years ago

9

Which of the following is an example of natural selection?

1 answer:

SVETLANKA909090 [29]2 years ago

4 0

Answer:

A) Hummingbirds drinking nectar from a plant.

Step-by-step explanation:

Here are some examples of natural selection: In a habitat there are red bugs and green bugs. The birds prefer the taste of the red bugs, so soon there are many green bugs and few red bugs. The green bugs reproduce and make more green bugs and eventually there are no more red bugs.

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140 + (-122) + (-10), I also need it with work.

Aleks04 [339]

Answer:

8

Step-by-step explanation:

140-122=18

18-10=8

6 0

2 years ago

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Write in exponential form. 3a • 3a • 3a

o-na [289]

3a^3 is the answer

Hope that helps

5 0

2 years ago

erma4kov [3.2K]

Answer: 0.72/20; 1.98/20; 17.3/20

0.036 * 10/10 = 0.36/10 * 2/2 = 0.72/20

0.099 * 10/10 = 0.99/10 * 2/2 = 1.98/20

0.865 * 10/10 = 8.65/10 * 2/2 = 17.3/20

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2 years ago

recent survey found that 71% of all adults over 50 wear glasses for driving. In a random sample of 30 adults over 50, what is

valentina_108 [34]

Answer:

Mean = 21.3

Standard Deviation = 2.48

Step-by-step explanation:

We are given the following in the question:

p = 71% = 0.71

Sample size, n = 30

We have to find the mean and the standard deviation of those that wear glasses.

$\text{Mean} = np\\=30(0.71)\\=21.3$

Thus, the mean of those who wear glasses is 21.3

$\text{Standard deviation} = \sqrt{npq}\\=\sqrt{np(1-p)}\\=\sqrt{30\times 0.71\times (1-0.71)}\\=2.48$

Thus, the standard deviation of those who wear glasses is 2.48

5 0

2 years ago

What is the value of w? 28=4(w−3)

sveticcg [70]

Answer:

w=10

Step-by-step explanation:

1. Divide 4 on both sides to cancel out the 4 on the right side since it is an equation so it has to remain “equal”/ balanced.

2. You get 7=w-3.

3. Add 3 on both sides.

4.You get w=10.

7 0

2 years ago

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