Did dinosaurs exist at the same time as humans

No

Explanation:

According to USGS, "After the dinosaurs died out, nearly 65 million years passed before people."

Hope this helps!

No I'm almost completely sure humans weren't even created when dinosaurs were alive and I have reasons because after the dinosaur population died out, millions of years had passed before humans appeared on Earth. But I do know that there were mammals that lived with the dinosaurs or appeared after the dinosaurs went extinct. Many scientists who study dinosaurs now think that birds are direct descendants of one line of carnivorous dinosaurs, and some consider that they in fact represent modern living dinosaurs, but this is only a theory that hasn't been proven.

your answer would be a. 12.5 kg