Answer:
B. 8 hours
Step-by-step explanation:
T=d/r
84/10.5 = 8 hours
1 point horizontally and 1 point vertically
2m
20=1×2×2×5=1×4×5
36=1×2×2×9=1×4×9
45=1×3×3×5=1×9×5[/tex]