1) Rounding those number to 4 significant digits
a. 431,801 = 431,800
b. 10,235.0 = 10240
c. 1.0348 = 1.035
d. 0.004384010 = 0.0040
e. 0.00078100 =0.0008
f. 0.0098641 =0.009
The criteria are rounding up to those numbers greater than or equal to 5, and considering the how low is the number or how great it is.
