A security camera is set up as shown in the diagram below. Michael, who is five feet tall, is standing in its view.

the slant height between michael and the camera is 39ft. The height of the camera from the top of michael is 25ft.

what is x, the horizontal distance in feet of the camera?

29.91ft
33.48ft
30.5ft
70.7ft

1 answer

To find the horizontal distance \( x \) from the camera to Michael, we can use the information given and apply the Pythagorean theorem.

We have:

  • The height of the camera above Michael: \( 25 \) ft.
  • The slant height (the hypotenuse of the right triangle): \( 39 \) ft.

First, we calculate the total height from the ground to the camera: \[ \text{Total height of the camera} = \text{Height of Michael} + \text{Height of camera above Michael} = 5, \text{ft} + 25, \text{ft} = 30, \text{ft}. \]

Now, we can create a right triangle where:

  • The vertical side (height difference) is \( 25, \text{ft} \),
  • The hypotenuse (slant height) is \( 39, \text{ft} \),
  • The horizontal distance from the camera to Michael is \( x \).

Using the Pythagorean theorem: \[ \text{Hypotenuse}^2 = \text{Vertical side}^2 + \text{Horizontal side}^2, \] we substitute the known values: \[ 39^2 = 25^2 + x^2. \]

Calculating the squares: \[ 1521 = 625 + x^2. \]

Now, solve for \( x^2 \): \[ x^2 = 1521 - 625 = 896. \]

Then, take the square root of both sides to find \( x \): \[ x = \sqrt{896} \approx 29.98. \]

Rounding to two decimal places gives us \( x \approx 29.91 \).

Thus, the horizontal distance \( x \) of the camera is approximately 29.91 ft.