Can somebody help me cuz

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

If the alternate hypothesis of an experiment is “the true mean height of the giraffes is more than 15 feet” what is the null hypothesis?

Mabel paid $2.95 for a granola bar dimes and quarters. she used five few were quarters then dimes. how many dimes and quarters did she use to pay for the granola bar.