I already tried D but it wasnt correct

A. E bisects AB and CD

Step-by-step explanation:

If E is a bisector, it creates two pairs of congruent sides. The included angles are congruent because they are vertical angles. The triangles will be congruent by SAS.

Mapiya's explicit formula : is right

Step-by-step explanation:

Sequence : 125,25,5,1,..

Hiroki's explicit formula :

Mapiya's explicit formula :

Formula of sequence=   a(r)^n

a = First term

n = No. of terms

r=Common ratio

a=125

So,

Hence Mapiya's explicit formula : is right