Cube of x is x^3, according to question
Y= 1/4 x ^3 -2
Answer:
13.5 minutes
Step-by-step explanation:

Cross multiply
3 × 576 = 128x
3 × 576 = 1,728
1,728 = 128x
1,728 ÷ 128 = x
13.5 = x
Answer: did u ever get the right answer?
Step-by-step explanation: