What is the radical equivalent for 125^3/4 ?

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Frank owns a $141,000 home, for which he has a 30-year mortgage in the amount of $700 a month. once he has paid off mortgage, how much will he have paid in investment? a. $111,000 b. $109,000 c. $120,000 d. $141,000