Simplify the sum. (2u3 + 6u2 + 3) + (2u3 - 7u + 6)

A. 9 - 7u + 6u2 + 4u3

B. 0u3 + 6u2 - 7u + 9

C. 0u3 - 7u2 + 6u - 9

D. 4u3 + 6u2 - 7u + 9

How do i find the estimate of 82 x 49?

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