Find the Unit Rate: $2.40 for 8 oranges

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?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The acceleration of an object due to gravity is 32 feet per second squared.what is acceleration due to gravity in inches per second squared?