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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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Answer: Hi there

Standard Form: the standard form of a line is in the form Ax + By = C where A is a positive integer, and B, and C are integers. The standard form of a line is just another way of writing the equation of a line.

Brainliest?

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3 0
3 years ago
Physicists estimate that there are between 1078 and 1082 atoms in the universe. How do these two numbers compare with one anothe
S_A_V [24]

Answer:

10,000 universes with the smaller number of atoms would fit inside the larger universe

Step-by-step explanation:

The correct question is as follows;

Physicists estimate that there are between 10^78 and 10^82 atoms in the universe. How do these two numbers compare with one another? If the larger number is right, how many universes with the smaller number of atoms would fit inside the larger universe?

Solution

To find the amount of the smaller number of atoms that will fit into the larger, we simply divide

Thus, we have;

10^82/10^78 = 10^4 = 10,000

4 0
3 years ago
A coin contains 9 grams of nickel and 16 grams of copper, for a total weight of 25 grams. What percent of the metal in the coin
Tatiana [17]

Answer:

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Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Area of DEF = 6 sq ft
Anna11 [10]

Answer:

54 ft^2

(54 in green box; 2 in grey box)

Step-by-step explanation:

We have 2 similar triangles, ABC and DEF.

The area of triangle DEF is given as 6 sq ft.

Side BC of triangle ABC measures 12 ft.

The corresponding side to BC in triangle DEF is EF. It measures 4 ft.

That gives us a scale factor from triangle DEF to triangle ABC.

<em>To find the scale factor between two similar polygons, divide the length of a side of the second polygon by the length of the corresponding side of the first polygon.</em>

scale factor = BC/EF = (12 ft)/(4 ft) = 3

The scale factor of side lengths is 3.

The ratio of the areas is the square of the scale factor.

ratio of areas = 3^2 = 9

Now multiply the area of the first triangle (DEF) by the ratio of areas to get the area of the second triangle (ABC).

area of triangle ABC = 9 * (area of triangle DEF)

area of triangle ABC = 9 * (6 sq ft)

area of triangle ABC = 54 sq ft

Answer: 54 ft^2

(54 in green box; 2 in grey box)

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3 years ago
What is the surface area of a cube with side lengths of 1/7<br><br> Please help
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Answer: 0.122449

Step-by-step explanation:

If one side is 1/7, first convert that into a decimal, which is 0.14286. Than square that 0.14286 x 0.14286= 0.020408. That’s the area of one square. Now multiply that by 6 (the number of sides in a cube) and you get 0.122449.

4 0
3 years ago
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