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vazorg [7]
3 years ago
15

Convert this number expressed in standard form to scientific notation. 28,500,000 1. Move the decimal to create the coefficient:

   2.8500000 2. Write in scientific notation:          2.85 × 10x What is the value of x in the scientific notation?
Mathematics
2 answers:
Scilla [17]3 years ago
4 0
It is 10 to the power 7
astra-53 [7]3 years ago
4 0

Answer: The value of x is 7.

Step-by-step explanation:-

Scientific notation is defined as the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example : 5000 is written as 5.0\times 10^3

As we are given that the value is 28,500,000

This number is written in scientific notation as : 2.85\times 10^{7}

Therefore, the value of x comes out to be 7.

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3 years ago
The average discharge at the mouth of the Amazon River is 4,900,000 cubic feet per second. How much water is discharged from the
Misha Larkins [42]

Answer:  Average discharge at the mouth of the Amazon River in 1 hour = 1.764\times 10^{10} cubic feet

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Step-by-step explanation:

Given : The average discharge at the mouth of the Amazon River =4,900,000 cubic feet per second.

i.e. The average discharge at the mouth of the Amazon River  in 1 second= 4,900,000 cubic feet

Since 1 hour = 3600 seconds

Then , the average discharge at the mouth of the Amazon River  in 1 hour =

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Since , there are 2080 hours in a typical year.

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6 0
3 years ago
What is the surface area of the figure? Use 3.14 for π.
fredd [130]

Answer:

Option 3

Step-by-step explanation:

We want to work out the surface-area

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2πrh+2πr^2

^ means to the power of

The radius is 15

The length is 18

2(3.14)(15)(18) + 2(3.14){15}^2

Part 1:

(6.28)(15)(18)

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Part 2:

First, we do the exponents,

15^2 = 225

(6.28)(225)

1413

Part 3:

1695.6 + 1413 = 3108.6

Answer: 3108.6

Hope this helps :)

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navik [9.2K]
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3 years ago
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