Express the following as an “ordinary” decimal number.
a.) 6.235 x 10^-2 mm
b.) 8.621 x 10^4 g
c.) 1.001 x 10^1 m
d.) 8.72 x 10^-4 s
I don't know what you mean by "ordinary" decimal numbers but if we are not concerned with the number of significant digits I would do the follows:
a.) 6.235 x 10^-2 mm = 0.06235 mm
b.) 8.621 x 10^4 g = 86210 g
c.) 1.001 x 10^1 m = 10.01 m
d.) 8.72 x 10^-4 s = 0.000872 s