1. which of the following is 0.708 written in scientific notations?
a.7.08×10^-8
b.7.8×10^-8
c.708×10^-10
d.70.08×10^-9
2. which expression represents the largest number
a.40.1×10^-6
b.4.1×10^-7
c.0.411×10^-7
d.0.04001×10-5
3. which expression is equal to 1 over 8000 written in scientific notations
a.8.0×10^3
b.1.25×10^-4
c.125×10^-5
d.1.25×10^4