Which will result in a perfect square trinomial

How do you find principle and simple interest

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 16)

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi