a submarine started at the surface of the ocean and began diving -15 kilomiter per minute towards the ocean floor the submarine travel at this rate for 48 minutes before coming to rest what is the staff in kilometers of the submarine restaurant on the ocean floor

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?