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9. The latest credit card interest on an unpaid balance is 19.1% compounded monthly. If John ha a credit card balance of $9200, how much must he pay monthly to pay off the debt in 4 years? (Remember-formula first!) (The answer is $275.18. You must show how to get this!!) 10. A 30-year mortgage for $400,000 at 5.8% compounded monthly requires a monthly pa d=$2347.01 (a) How much is owed after 15 years? (Formula first!) (b) Use your answer from part (a) to determine the equity after 15 years. Einariciald Matfermatich foemerath Cempoond hiterest and Fresen value fermelac: Continuous Compounding interest Ferwilt Sawings and Paytuent (sinking Fundt) Fore:itar: Lenortikation: d=P(1(1+r/m)1=P(1(1+1)+7)1