Question

HELP!!
A valley is 42 feet above sea level. A stream
which flows through the valley slowly erodes
the land. Let y represent the valley’s altitude
above sea level


Which inequality below describes y over
time?

Answer 1

these are the inequalities
1. y ≤ 42
2. None of these
3. y < 42
4. y > 42
5. y ≥ 4

Answer 2

\[42 \ge y - at \ge 0\]

Where, a is the rate of erosion over a suitable unit of time
t is the time in the aforesaid unit

Answer 3

from the options it should be 1

Answer 4

I tried that but it didnt work

Answer 5

next best answer is 3, but I am not sure if that represent the situation that well