Dinosaurs have been extinct for about 6.5x10^7 years, while Neanderthals have been extinct for 3.0 x 10^4 about years. About how many times longer have dinosaurs been extinct than Neanderthals?
To find out how many times longer dinosaurs have been extinct than Neanderthals, we can divide the time dinosaurs have been extinct by the time Neanderthals have been extinct.
6.5 x 10^7 / 3.0 x 10^4
= 2.167 x 10^3
Therefore, dinosaurs have been extinct approximately 2,167 times longer than Neanderthals.