
2.

The area, A, in square metres, of a circular oil spill after t min
is given by A = pt^{2}. The instantaneous rate of
change of the area of the oil spill after 2 min is approximately
a.  3.14 m^{2}/min  c.  12.57 m^{2}/min  b.  6.28
m^{2}/min  d.  18.85
m^{2}/min 
