What is the completely factored form of t4 − 16? (1 point) (t2 + 4)(t2 − 4) (t2 + 4)(t + 2)(t − 2) (t2 + 4)(t − 2)(t − 2) (t + 2)(t + 2)(t + 2)(t − 2)?

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest