Adolphin is swimming 18 feet below the surface of the ocean. there is a coast guard helicopter 75.5 feet above the surface of the water that is directly above the dolphin. what is the distance between the dolphin and the helicopter?

Distance between dolphin and helicopter = 93.5 feet

Explanation:

Distance at which dolphin swimming below the ocean= (-) 18 feet

(it is represented as  the negative number as it denotes the distance below the ocean)

Distance at which helicopter is above the ocean = (+) 75.5 feet

(it is represented as the positive number as it denotes the distance above the ocean)

Distance between dolphin and helicopter = 75.5 - (-18) feet

                                                                       =   75.5 + 18 feet

                                                                       =   93.5 feet

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x