What’s the mode: 6, 8, 4, 9, 3

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

Iknow the answer but the calculator doesn't seem to give the right one

What is the approximate difference in tenths between √12 and √15?