A music store buys instruments and then sells them for 30% more than they paid. If the store buys a guitar for 45, what will the store sell it for?

Since the guitar was bought for $45 and the store sells instruments for 30% more than they paid, we first need to find out how much 30% of 45 is.

0.30*45=13.5.

Then, we can just add 13.5 to the starting price of 45 to find how much the store will sell it for.

45+13.5=58.5.

Therefore, the answer is $58.5.