earth is approximately 5x10^9 years old . for which of these ages could this be an a aproxiamation
A . 4,968,000,000 years
B . 45,000,000,000 years
C . 4,531,900,000 years
D. 3.65 x 10 ^ 9 years
E . 4.969999999 x 10^9 years