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13 problems match “square roots”. Clear

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11. Water width under a parabolic arch ●●○○○ 20 ptsThe vertex of a parabolic arch bridge is 2 meters above the water surface, and the width of the water surface is 8 meters. When the water level rises by $\frac{1}{2}$ meter, find the width of the water surface in meters. Round to two decimal places.
12. Solving a quadratic with exponents ●●○○○ 20 ptsSolve $4(3 - x) + 9^2 = x(x - 4) + 7^2 - 5$ for the positive value of $x$.
13. Square root plus arcsine value ●●●○○ 50 ptsGiven a real number $x$, find the value of $\sqrt{x(x+1)}+\arcsin \sqrt{x^{2}+x+1}$, in radians. Round to two decimal places.

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