Answer:
In 1 minute, the submarine's depth is -6/5 miles.
Explanation:
Let's form an equation to solve the problem.
=> -3/4 miles = 5/8 minutes
=> -3/1 miles = 5/2 minutes
=> -3 miles = 5/2 minutes
=> -3/1 รท 5/2 = 1 minute
=> -3/1 x 2/5 = 1 minute
=> -6/5 miles = 1 minute
Hence, in 1 minute, the submarine's depth is -6/5 miles.
Hoped this helped