You can model an arch at your school using the equation y=-0.8 (x-5) (x+5), where x and y are measured in feet. The x-axis represents the ground. Find the width of the arch at ground level.

The width of the arch at ground level is ___ feet.

Question

Stacy

Mathematics

23 March, 13:17

You can model an arch at your school using the equation y=-0.8 (x-5) (x+5), where x and y are measured in feet. The x-axis represents the ground. Find the width of the arch at ground level.

The width of the arch at ground level is ___ feet.

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Answers (1)

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Troy Leonard · Answer 1

10 ft

Step-by-step explanation:

At ground level, y = 0. Setting - 0.8 (x-5) (x+5) = to 0, we get x = 5 and x = - 5 as solutions. The arch touchs the ground at x = - 5 and x = 5 ft.

The width of the arch at ground level is 5 - (-5), or 10 ft.

You can model an arch at your school using the equation y=-0.8 (x-5) (x+5), where x and y are measured in feet. The x-axis represents the ground. Find the width of the arch at ground level.The width of the arch at ground level is ___ feet.

You can model an arch at your school using the equation y=-0.8 (x-5) (x+5), where x and y are measured in feet. The x-axis represents the ground. Find the width of the arch at ground level.

The width of the arch at ground level is ___ feet.