How to find the height of a cylinder knowing the volume

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

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?

What is the quotient of m^6/5 ÷ 5/m^2? assume m does not equal pl