Please see the below and advise The scrap value of a machine at the end of its useful life is given by S(n)=C(1-r) n , where C is the original cost,

Please see the below and advise

The scrap value of a machine at the end of its useful life is given by S(n)=C(1-r)n , where C is the original cost, n is the useful life of the machine in years, and r is the constant annual percentage of value lost. Find the scrap value of the following machine.

S=?