Answer:
Step-by-step explanation:
Given equation
Use the property of logarithm
⇒ 
Apply to the given equation
Assuming the 2nd one is 4a^2 - 20a +25, it is the one you're looking for. It factors to be (2a-5)^2
.723
So since you need to move the decimal 2 places forward to get the percent,
just move it backward. Reverse operation.