If it took 4 miles per hour you multiply that twice cuss its traveling back then forth so you repeat the same process 30 miles times 2 which is 60 hope this helps.
Answer:
Ues math w/a/y
Step-by-step explanation:
ues it
m= 0/-2
C) 0.9
density = mass / volume
density = 82 / 96
density = 0.9 g/mL
