Given :
Andy is scuba diving. He starts at sea level and then descends 10 feet in 212 minutes.
To Find :
Andy's descent as a unit rate.
Solution :
Descent as a unit rate , R is distance covered per unit time :
So,

Now, distance covered in 6 minutes.

Distance from sea level , D = 212 + 0.282 = 212.282 feet.
Hence, this is the required solution.