Pls awnser these i dont understand them, like i beg u

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Rose and andrew are financing $128,000 to purchase a condominium. they obtained a 15-year, fixed-rate loan with a rate of 5.05%. they have been given the option of purchasing up to four points to lower their rate to 4.81%. how much will the four points cost them?

What is the answer to question 11? will give extra points! include a explanation (reasonable) for you : )