Let x= i34
We know i2=-1
X= (i2)17
X= (-1)17
X= -1
As given demand α 1/price
In 2002 1600 units were demanded when price was Rs 5
So according this in 2012 when price is Rs. 25 no. of units demanded is (1600*5)/25 i.e. 320units
Steward’s food bill = 18 of salary = 6500
Salary = 6500*8 = 52000
Steward’s yearly salary = 52000*12 = Rs. 624000
A = P(1+r100)t
90000 = 30000(1+6100)t
3 = (1+6100)t
Taking log on both sides:
log 3 = log (106100)t
0.4771 = t*[log(106) – log (100)]
0.4771 = t*(2.025 – 2)
t = 0.47710.025 = 19.084
Acc to ques.: Distance travelled = k*t2
64 = k*42
k = 4
Distance travelled = 4*52 = 100 m