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Gemiola [76]
3 years ago
10

A cellphone weighs about 2.8x10^n pounds. Which value of n is most reasonable?

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
7 0

Answer:

Approximate weight of cell phone is between 100 gm to 200 gm.

1 Pound = 0.45359237 Kilograms

           = 0.4545 kg

2.8 pound = 2.8 × 0.4545

               = 1.2727 Kg

It is given that weight of cell phone is 2.8 \times 10^n pounds, means 1.2727 \times 10^n Kilograms.

Which is equal to, 1272.7 \times 10^n grams.

Because, 1 Kilogram = 1,000 gram

If, n=0

Weight of cell phone = 1272.7 grams=1.2727 Kg

when, n=1

Weight of cell phone = 12727 grams=12.727 Kg

n= -2,

Weight of cell phone = 12.727 grams

n=- 3

Weight of cell phone = 1.2727 grams

None, of the weights are appropriate weight of cell phone.Neither of four options provided here is true.

Sidana [21]3 years ago
5 0

Answer:

The correct answer is B.) -1

Step-by-step explanation:

I think we had different answer choices but for me It was B which is -1

Hope this helps!!

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VMariaS [17]

Using the concept of probability and the arrangements formula, there is a  

0.002 = 0.2% probability that the first 8 people in line are teachers.

----------------------------------

  • A probability is the <u>number of desired outcomes divided by the number of total outcomes.</u>
  • The order in which they are positioned is important, and all people will be positioned, and thus, the arrangements formula is used to find the number of outcomes.

The number of possible arrangements from a set of n elements is given by:

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The desired outcomes are:

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Thus, D = 8! \times 4!

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For the total outcomes, <u>number of arrangements of 12 people</u>, thus:

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The probability is:

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0.002 = 0.2% probability that the first 8 people in line are teachers.

A similar problem is given at brainly.com/question/24650047

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Step-by-step explanation:

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