Help help l Please...Thanks

The congestion charge does seem to be effective, as 2-person cars are  the highest on the table of cars entering the city. Also, the mean has increased to 2.37, people per car on average (farther away from an average of 1 person per car than before), which shows that the congestion charge has worked.

How I found the new mean:

[(1 x 17) + ( 2 x 54) + (3 x 14) + (4 x 8) + (5 x 2)] / (17 + 54 +14 +8 + 2)

mean = sum of values / number of values

correct answer:

i^31 = -i

1gm = 1000mg so 0.1gm = 1000mg

first, convert the weight to kg

160lb * 1kg/2.2lb = 72.7kg

next, the dose

72.7kg * 100mg/kg = 7270mg