Dissolved Oxygen Concentration and Depth

Question

In a lake, the dissolved oxygen decreases by 1.5 mg/L for every 5 m increase in depth. If the surface dissolved oxygen is $$9$$ mg/L, what is the concentration at a depth of $$15$$ m?
 
| Depth (m) | Dissolved Oxygen (mg/L) |
|-----------|-------------------------|
| 0         | 9                       |
| 5         | 7.5                     |
| 10        | 6                       |
| 15        | 4.5                     |

Accepted Answer

4.5 mg/L

Answer

3.5 mg/L

Answer

7.5 mg/L

Answer

5 mg/L

Rank	User	Correct Count	Attempt Count	Time	Score
#1	daeunhahaho	2	2	0m 00s	200
#2	jayeyuen2009	2	2	0m 18s	182
#3	leoguinea0611	2	2	1m 27s	113
#4	chloeh59	1	1	0m 07s	93
#5	zhenji104	2	2	1m 53s	87
#6	iansong143	1	1	0m 18s	82
#7	ntgamja1	1	1	0m 22s	78
#8	brainna.guscott	1	1	0m 24s	76
#9	sharlyn.dubey1008	1	1	0m 26s	74
#10	kamaliganesh13	1	1	0m 27s	73

Question Leaderboard