Express the exponential number 2.25 x 10-4 as an ordinary number. 22,500 0.000 022 5 225,000 0.000 225 none of the above

For this case we have the following number:
 2.25 x 10-4
 We observe that it is written in exponential notation.
 The exponent is negative, therefore, we must move the point to the left.
 We have then:
 2.25 x 10-4 = 0.000225
 
 0.000225