Asubmarine is dividing to a total depth of 45 feet. it descends 15% of the total depth in 1 minute. how deep will the submarine be after 4 minutes?

answer: 12

step-by-step explanation:

because yes

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.