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Verified Answer :

rarrininger

A = 1/2(b X h)
20.025 = 1/2(8.9 X u)
20.0252/1= 1/2 2/1(8.9 x u)
40.05 =8.9u
40.05/8.9 = 8.9u/8.9
u = 4.50

Check
A = 1/2(b X h)
A = 1/2(8.9 X 4.5)
A = 1/2(40.05)
A = 20.025 in²

md1011

The answer is 2.25...

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