If x = 10 y then y = ………

(a) ln 10
(b) ln x
(c) ln 1
(d) e

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?