roughly it takes light less than 0.000000003 of a second to travel a one-meter distance. express this number in the form of a*10^(n) where 1<a<10 and is a one-digit number
a. 3*10^(8)
b. 3*10^(-8)
c. 3*10^(9)
d. 3*10^(-9)
a. 3*10^(8)
b. 3*10^(-8)
c. 3*10^(9)
d. 3*10^(-9)