Can someone me with question #8 thxxx

Which statement about perfect cubes is true

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

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi