A certain industrial machine depreciates so that its valuetyears after purchase is given by

Q(t) = 75,000 e -0.05t

i) What was its value at the time of purchase?

ii) What will its value be 10 years after purchase?

iii) At what rate is the value of the machine depreciating after t years? Hint: differentiate Q(t).

iv) Does this rate depend on t or is it a constant?

v) At what rate is the value of the machine depreciating after 10 years

help needed please.