Someone please help me with this

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days