Answer:
A: 6.94 x 102
Explanation:
Why is 694 written as 6.94 x 102 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 694 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: 694
New Number: 6.94
Step 2
Now, to find b, count how many places to the right of the decimal.
New Number: 6 . 9 4
Decimal Count: 1 2
There are 2 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 = 6.94
b = 2
Now the whole thing:
6.94 x 102
Step 4
Check your work:
102 = 100 x 6.94 = 694