I am an Advanced Open Water Diver. I plan to do three dives. The first dive is an 80 foot dive for 20 minutes followed by a 42 minute surface interval. The second dive is to 50 feet for 37 minutes followed by a surface interval of one hour. My third dive is to 50 feet. What would be my maximum allowable bottom time for this third dive? ​

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Acid rain is caused by human activity. select the best answer from the choices provided t f