Please help me it’s the bottom question with the picture!

How many zeros does the function f(x)=4x3-x2+1 have

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?

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?