Answer:
Step-by-step explanation:
I've written my working in the picture. I hope it's clear. :,)
I've expanded the brackets, simplied the fractions before simplifying them again, having found the common denominators of the constants and x terms.
V(speed)=3.5 mile per hour
Answer: are you asking for this or
The correct answer is 9 feet.
V≈141.37m³