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Gemiola [76]
4 years ago
10

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

Mathematics
2 answers:
11Alexandr11 [23.1K]4 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]4 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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In which of the expressions below will x = 12.5? Select all
erma4kov [3.2K]

The answer is D

2x / 5 = 5

5 x 5 = 25

2x = 25

25/2

x= 12.5

4 0
3 years ago
Read 2 more answers
All of the ingredients are purchased in bulk sizes. The butter comes in 12-cup containers. How many recipes will each container
Citrus2011 [14]

Answer:

some information is missing, so I looked for similar questions and found the attached image:

since each recipe requires ¹/₂ cup of butter, you are able to make 12 ÷ ¹/₂ = 24 recipes with one container of butter (assuming you have all the other ingredients).

One-half, ¹/₂, is a fraction that can also be written in decimal form as 0.5. Two times ¹/₂ is equal to 1, and similarly, twenty four times ¹/₂ is equal to 12.

4 0
3 years ago
Find the volume of the cone.
zhenek [66]

The volume of the cone of  radius 5 units and height 3 units is 78 cubic units.

Given radius of cone 5 units and height of cone be 3 units.

We are required to find the volume of cone.

Volume is the amount of substance that a container can hold in its capacity.

Formula of cone is 1/3 *πr^{2} h in which  r is radius and h is height of cone.

We have to just put the values in formula.

Volume=1/3 *π5^{2} 3

=25*3π/3

=75π/3

=25π

Put π=3.14 as said in the question.

=25*3.14

=78.5 cubic units.

After rounding we will get 78.

Hence the volume of cone whose radius is 5 units and height is 3 units is to be 78 cubic units.

Learn more about volume at brainly.com/question/463363

#SPJ4

Question is incomplete as it should include the figure.

5 0
2 years ago
Write the equation of the line that passes through the points (-5, 21) and (4, -15) in standard form
saveliy_v [14]

Answer:

y = -4x + 1

Step-by-step explanation:

The line passes through points (-5,21) and (-4,15)

Slope(m) = change in y ÷ change in x

m = \frac{-15 - 21}{4 - -5}

m = \frac{-15 - 21}{4 + 5} = -36/9 = -4

Taking another point (x,y) on the line and comparing it with point (4,-15):

-4 = \frac{y + 15}{x - 4}

Cross multiplying gives:

y + 15 = -4x + 16

y = -4x + 1

5 0
4 years ago
Consider the hypotenuse of a right triangle with two legs that are two inches and one inch long, respectively. The length of the
Olenka [21]

Answer:

b

Step-by-step explanation:

Pythagoras formula for the relation of the side lengths of a right-angled triangle :

c² = a² + b²

c is the Hypotenuse (the side opposite of the 90 degree angle). a and b are the "legs".

so, we have here

c² = 1² + 2² = 1 + 4 = 5

c = sqrt(5) = 2.236067977...

so, answer option c is too big (values bigger than 3).

answer options d and e are too small (values smaller than 2).

a

9/4 = 2.25

10/4 = 2.5

this is also too big .

that leaves us with b

17/8 = 2.125

18/8 = 9/4 = 2.25

that is correct

7 0
3 years ago
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