Dinosaurs have been extinct for about 6.5x10^7 years, while Neanderthals have been extinct for about 3.0x10^4 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
Calculations:
6.5x10^7 / 3.0x10^4 = 2166.67
Since we are looking for how many times longer dinosaurs have been extinct than Neanderthals, we will round up to 20,000 times longer.