A. The depth of the submarine descending from sea level is given as
=> 35, 814 - d
B. Speed given = 3 feet per second => 3ft/s
Also, speed = distance/ time.
since the depth of the ocean is 35,814 feet. y = 35, 814
The time taken can then be obtained from y= -3x, where x is the time
x = y/3
x = 35814/3
x = 11938 seconds
C. Since the depth is 35,814 This means that y = 35, 814
x = 3hours = 3 x 60 x 60 seconds = 10800 seconds
If y = kx,
k = y/x
k = 35814/ 10800
k= 3.32
So model is y = 3.32x