Answer:
20 cm
because
1 cm = 0.1 dm
so 1 dm = 10 cm
then:
2 dm = 2 * 10 cm = 20 cm
keep the car at a friends house untill you find a place to get it fixed at... or keep it at a trustworthy family members house.
If these don't help then im sorry.
Answer: No; Most students have a curfew of 9 pm or earlier