"the time since dinosaurs became extinct is roughly equal to _____ average human lifespans"

average human lifespan: 2.4 x 10^4
time since dinosaurs became extinct: 2.4 x 10^10

the time since dinosaurs became extinct is roughly equal to average human lifespans average human lifespan 24 x 104 time since dinosaurs became extinct 24 x 101 class=