A leak in the water tank causes the water level to the decrease by 3.6×10^-2 milliliters each second about how many milliliters does the water level in the tank decrease in 5 hours, or 1.8×10^4 seconds?
a.2
b.5
c. 5.4
d. 6.5
e. 10^-8
f.10^-2
g.10^2
h.10^6