Assuming her period is one of those perfect, mythical ones that are very predictable, so that she will know that it will last the full seven days.

(the answer is 42)

(and the 100 projected by nasa would last just under 17 days)

Totally need to go to bed.

But instead, I calculated the number of tampons a regularly menstruating Sally Ride would need for a 7 day mission.

I need help