What is the exact volume of the cone? 28π in³ 563π in³ 1963π in³ 196π in³

Can some one me, i’ve been asking for so long

What is the compound interest in a three-year, $100,000 loan at a 10 percent annual interest rate a) 10.00 b) 21.00 c) 33.10 d) 46.41

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.