c tell your parents it could be someone very dangerous and meeting people online can be very risky I would also tell my bsf just for fun tho
1) 15 / 12 = 1.25 ratio
2) to increase acceleration 1.25 times (with same F, or same engine) you have to lower mass 1.25 times
3) 1515/1.25 = 1212 kg
choose A
A and c...............................
