Question

A certain human red blood cell has a diameter of 0.000007 meters. Write an expression that represents this diameter, in meters in scientific notation.

Answer 1

7 x 10^-6 You're basically just moving the decimal place over six times until there is a whole number before the decimal.

Answer 2

Given is the diameter of a human red blood cell equal to 0.000007 meters. It says to convert and rewrite this measurement in meters in scientific notation.

A scientific notation is written as product of a significant number and exponent of 10's. To find significant number from given 0.000007, we must move decimal point in either right or left direction such that it becomes integral value and in addition we would multiply some exponent of 10's to make its value equivalent to given 0.000007 meters.

Re-writing in scientific notation :-

0.000007 meters

=
`(7)/(1000000) \;meters`

=
`(7)/(10^(6)) \;meters`

`=7*10^(-6) \;meters`

So, final answer is 7 x 10⁻⁶ meters.