Question

what is the standard form of 721000​

Answer 1

Answer:

7.21 is the standard form

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Answer 2

Answer:

the standard form of 721000​ is $7.21 * 10^5$

Step-by-step explanation:

Follow the steps below to see how 721,000 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: 721,000

New Number: 7.21000

Step 2

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

New Number:    7 . 2 1 0 0 0

Decimal Count:   1 2 3 4 5

There are 5 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: $a * 10b$

$a = 7.21$ (Please notice any zeroes on the end have been removed)

$b=5$

Now the whole thing:

$7.21 * 10^5$

Step 4

Check your work:

$105 = 100,000 * 7.21 = 721,000$

hope it helps you