The answer is B, kilometers.
—Evidence—
•] it is assumed that there are 6 stadia in a kilometer (km), meaning that Eratosthenes found the Earth's circumference to be about 42,000 km
The answer go to be 200 and you subtract
X=number of days
X=6
16+4•X=
16+4•6=
16+24=40
Marnita will have 40 seashells after 6 days
1. 13/4
2.60
3. in 36 mins (I don't know about this one)
4.<
5. 3/8< 2/3< 19/24