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

Mathematics

Lillianna Weber

23 August, 23:18

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.

+3

Answers (1)

Know the Answer?

Tania · 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.