2x2^2=8+3=11
11 is your answer I believe.
A is 9,4 B is -9,4 all you do is flip the sign according to the axis
Answer:
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First you need to get 3% of 7 so
7x0.03= 0.21
then you need to add that 3% onto 7
7+0.21=7.21
therefore the door frame is now 7.21 feet high
