Oi :)
1) There are 3 significant digits

2)
15 Mi/h = 22 ft/s
3)

4)
There are 4 significant digitis. Leter C
80% is the score percentage
Answer:
the area is 1800
Step-by-step explanation:
ik this doesn't answer the full question but hope it helps <3
The answer would be 5.79
Hope I helped :)