A sequence is shown
3, 6, 12, 24, 48, …
Which function, f(n), represents the (n)th term of the sequences, where f(1)=3? Explain how you know this.

a. fn=2∙3n-1
b. fn=32n-1
c. fn=32n
d. fn=6n

Thank you.

1. a music store marks up the instruments it sells by 30%. a. if the store bought a guitar for $45, what will be its store price? b. if the price tag on a trumpet says $104, how much did the store pay for it? c. if the store paid $75 for a clarinet and sold it for $100, did the store mark up the price by 30%?