Answer:
OK
Step-by-step explanation:
What language us That
The level of the sea's surface, used in reckoning the height of things such as hills and as a barometric standard.
If you are looking for the exact height of the sea just google it it's different all over the world.
Hope that's what you're looking for.
Answer:
5xy-x^2t+2x7+3x^2t= 7xy+2x^2t
Step-by-step explanation: