Which expression results in a rational number?

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume

What is the area of the shaded sector?