Ineed with this problem.. it's urgent!

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Stacey filled her 1/2 cup of measuring cup seven times to have enough flour for a cake recipe how much flour does the cake recipe calls for