exam Maths Puzzle Numerical Ability

i need help with 10 to the negative 2nd power???? please help me.

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exam Other Question

Football fields measure 100x53 1/3 yards excluding the two end zones, which each measure 10 x 53 1/3 yards. When comparing the football field with a basketball court that measures Solve the equation.

x^2+2x-80=0