7-9 all plz

7. You buy a stove for $1500 on March 20,2023 . The store gives you 4 months "interest free", so on July 20,2023 you must pay the $1500. However, the store charges an administration fee of $50, to be paid today. What rate of simple interest, r, are you being charged for this "interest free" plan? (A) 9.97% (B) 10.00% (C) 10,32% (D) 10.35% 8. Jimmy borrows $250,000 from Sally on May 3,2023 by writing a promissory note, due in 6 months at a simple interest rate of 5%. Sally uses ordinary interest to determine the maturity value. What is the maturity value of the note? (A) $256,493.06 (B) $256,404.11 (C) $256,388.89 (D) $256,301.37 9. You go to a bank that offers a 270 -day discounted loan at d=9%. You wish to walk out the door with $5000. What size loan should you ask for? (A) $4687.90 (B) $5356.62 (C) $5332.88 (D) $4667.12