Sorry it wont upload
that is the whole first bit of the question, it then asks
a) Show that P(t)=P(t(subscript 0))e^-kt is a solution of the differential equation dP(t)/dt = -KP(t)
and
b) What percentage decline will there be after 10 years, given a 10% decline in 4 years? (answer = 23%)
and...