Answer: I believe the answer is A.
Explanation: hope this helps
The difference between these two figures is the shape of the base.
Prisms are "named" by their bases.
A rectangular prism has a rectangular base, a triangular prism has a triangular base, a square prism would have a square base, etc.
You have to subtract 23.75 from 42.50 to get your answer of 18.75
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1) Circumference of Earth: Diameter x π → 12,800 x π = 40,212.39 km
2) time in Hour = distance/speed → distance = 40,212.39 and speed = 2 Mi/h
1st: convert miles into km : 1 mile = 1.609344 km and 2 miles = 3.218688 km
2nd: convert speed into km/h → speed = 3.218688 km/h
And time in hour = 40,212.39 / 3.218688 → time = 12,493 hours OR in days:
12,493 / 24 = 521 days (OR 104 weeks, including 2 days of rest)