Need help with practice problem please

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b.false

The price of one share of a company’s stock declined $13.89 every day for 2.5 days what was the stocks total decline in price