3- Find order of magnitudes.

The order of magnitude of a number is the power of ten when the number is expressed in scientific notation.

Question 5:  Find the order of magnitude of 5,442.5 and 0.000435.


Sometimes you do not need or you can not get precise answer; instead you can calculate something to the nearest order of magnitude.  

Question 6: Suppose you have a box full rice. To  the nearest order of magnitude, your want to estimate the number of rice pieces inside the box.  The edge of your box is 1.0 m and you measure a typical rice piece to have a length of about 6 mm and radius of about 2 mm.