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Hello!

Your answer is most likely to be 325m...

Explanation:

Looking at the map you'll mostly need and good inference skills to answer the question...

The closest line is 300m right?

So if T is like in the middle (halfway because it doesn't form another line (i.e. it +25m), it means it is at a HIGHER elevation than at the last measurement...it could even be the PEAK!

So it would be 325m because :

1. The different topographic lines go up only in 50's: T is halfway along this because it doesn't really form a new line...

2. It is in the middle of a circle at 300m...this means that it WONT be any lower than 300m (or insanely higher like 450!)

answer; in the united states the plains include the great plains of the west and the tail grass prairie to the south of the great lakes extending east to the appalachian plateau