Final answer:
To simplify 4 times the 4th root of 128, multiply 4 by the 4th root of 128, which is 2, resulting in 8.
Step-by-step explanation:
To simplify 4 times the 4th root of 128, we first find the 4th root of 128, which is 2.
Next, we multiply 4 by 2, giving us 8.
Therefore, 4 times the 4th root of 128 is equal to 8.