describe how to write 0.0000672 in scientific notation

Question

 0.0000672 answer that in scientific notation

Answer 1

Scientific notation has the form N x 10^a where:

• N must be greater than or equal to one but less than 10 (1≤N<10)
• The exponent a is a positive or negative integer.  Positive values move the decimal point a places to the right, negative values move the decimal point a places to the left.

 

For 0.0000672, we need a number between one and ten, so it most be 6.72 (0.672 is less than one and 67.2 is greater than 10).  But the decimal point in 6.72 needs to move 5 places to the left to make it 0.0000672, so we multiply 6.72 by 10^-5 which moves the decimal point 5 places to the left.

 

6.72 x 10^-5 = 0.0000672

 

 

Answer 2

First put into a number greater than zero and less than 10

0.0000672 becomes 6.72

Now determine the power of 10

The decimal point was moved 5 place to the left.

The power is -5

0.0000672 = 6.72 x 10^-5