For number 1. it is wrong. It is fresh water. Ocean water is salt water. I don't know the rest, sorry. I will come back if I find out though! :D
Try this solution, note, the shown way is not the shortest one.
The answer is marked with red colour.
Answer:
oof
21.2 x 0.02 = 0.424
2.05 x 0.004 = 0.0082
Step-by-step explanation:
Answer: D
Step-by-step explanation:
2x + (2x +4 ) =40
x= 9
2(9) +4 =22
The answer should be true