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3 years ago

How many elements have been found to occur in nature? 90 92 96 99

Biology

2 answers:

belka [17]3 years ago

7 0

92 are the elements found

valentina_108 [34]3 years ago

6 0

92 elements have been found to occur in nature

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Human Impacts on the Earth:Question 1

FromTheMoon [43]

Answer:

it is increasing it because it is pushing animals out of their ecosystem and destroying their food sources and homes.

Explanation:

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3 years ago

Which of the following in NOT a major characteristics used to identify minerals ?

murzikaleks [220]

One would be silicate

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3 years ago

In a fetus with congenital adrenal hypertrophy (cah), the adrenal gland produces ________ cortisol, and as a result, the pituita

Elena L [17]

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3 years ago

What happens in a decomposition reaction? O A. Two or more substances combine to form one substance. B. Two ions trade places. O

denis-greek [22]

Answer:

C. Larger compounds break down into two or more smaller compounds.

Explanation:

During a decomposition reaction, the bonds between the atoms break down in the starting substance. The atoms then rearrange to form new bonds, resulting in new substances with properties different from the starting material.

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2 years ago

Joyce is planting tulips in her garden, and she has 5 red bulbs and 5 white bulbs to plant in one row. What is the probability t

Stolb23 [73]

Answer:

$\frac{1}{126}$ or 0.0079.

Explanation:

Joyce is planting tulips in her garden.

Number of red (R) bulbs = 5

Number of white (W) bulbs = 5

Total number of ways to plant 10 bulbs in one row is

$\text{Total ways}=\frac{10!}{5!5!}$

$\text{Total ways}=\frac{10\times 9\times 8\times 7\times 6\times 5!}{5\times 4\times 3\times 2\times 1\times 5!}$

Cancel out common factors.

$\text{Total ways}=252$

It is given that she randomly plants the bulbs so that all 5 red bulbs are next to each other and all 5 white bulbs are next to each other.

Required outcomes are

RRRRRWWWWW and WWWWWRRRRR

$\text{Required outcomes}=2$

Formula for probability:

$Probability=\frac{\text{Required outcomes}}{\text{Total ways}}$

$Probability=\frac{2}{252}$

$Probability=\frac{1}{126}$

$Probability\approx 0.0079$

Therefore the required probability is $\frac{1}{126}$ or 0.0079.

5 0

3 years ago