I need help on answering these questions.. if you can help me figure it out i would owe u big time!!

7b is the one we need to know, the others there as you may need to know
what was aked of me before #7

6. Notice the spike in the concentration of oxygen around 300 million
years ago. What biologic event coincides with this spike?

The event that coincides with this spike is The Age of Giant Insects

Insects don’t have lungs and rely on the diffusion of oxygen through
their exoskeleton. What is the relationship here?



7a. If we compress the approximately 5,000 million years in history of
the earth into the length of a day, how many years would each second of
this day equal? To do this, you need to find out how many seconds are in
a day.

60 sec x 60min x 24hr = sec

min hour day day



Then, divide that number of seconds per day into the 5,000 million years
to get years per second



7b. At what time of this compressed day would Columbus have discovered
the New World? Use your answer from 6a to find out how may seconds ago
Columbus would have discovered the New World and subtract that number of
seconds from 12 midnight to discover what time this happened.

(I don't know if he menat to look at 7a, because it doesn't seem to make
sense to me to look at 6a, but maybe I am worng.)