, 28.10.2019 14:45 saintjohn

# The area of rectangle of is 144cm².if the length is 36cm. what is the perimeter? ​

19.2+2.8y=44.4
2.8y=44.4-19.2
2.8y=25.2
y=9
Pls gibe us a copy so that we or i can answer it

intindihin mo lang tulad ng pag intindi sa jowa mo siz

Q: How is the number 720,000,000 written in Scientific Notation?

A: 7.2 x 108

Why is 720,000,000 written as 7.2 x 108 in scientific notation?

The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.

Calculating scientific notation for a positive integer is simple, as it always follows this notation:

a x 10b

Follow the steps below to see how 720,000,000 is written in scientific notation.

Step 1

To find a, take the number and move a decimal place to the right one position.

Original Number: 720,000,000

New Number: 7.20000000

Step 2

Now, to find b, count how many places to the right of the decimal.

New Number:7.20000000

Decimal Count:  12345678

There are 8 places to the right of the decimal place.

Step 3

Building upon what we know above, we can now reconstruct the number into scientific notation.

Remember, the notation is: a x 10b

a = 7.2 (Please notice any zeroes on the end have been removed)

b = 8

Now the whole thing:

7.2 x 108

Step 4

108 = 100,000,000 x 7.2 = 720,000,000

Step-by-step explanation:

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A.express the following in simplified form. 1.) 3x + 10x - 9= 2.)7x -3x -5 -1= 3.)4a² - 2a + 7a - 6a +1= 4.)9y + 8 + 4y - 10= 5.)4(x-6) + 2(x + 1)=