Dinosaurs have been extinct for about 6.5 x 10^7 ears, while Neanderthals have been extinct for about 3.0 x 10^4 years. About how many times longer have dinosaurs been extinct than Neanderthals?
A. 1,000 times longer
B. 2,000 times longer
C. 10,000 times longer
D. 20,000 times longer
D. 20,000 times longer
To find the answer, simply divide the number of years dinosaurs have been extinct by the number of years Neanderthals have been extinct:
(6.5 x 10^7 years) / (3.0 x 10^4 years) = 2166.67
So, dinosaurs have been extinct approximately 2167 times longer than Neanderthals. This is closest to 20,000 times longer.