2.5=1/4d^1/2
both 1/4 and 1/2 are fractions also 1/2 is an exponet for d
d^(1/2) = √d
2.5 = (1/4) √d
Multiply both sides times 4:
4 x 2.5 = 4 x (1/4)√d
10 = √d
To remove a square root, square both sides:
100 = d
