How do i solve this?

Ineed solving this problem h/8=-25 solve for h idk how to this can someone show me and also give an answer you

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?