Question
.
An illustration shows a triangle with the 90 degree angle symbol located in the lower left. The left-hand side of the triangle extends upward past the vertex. This long line is labeled movie screen and measures 30 feet. The shorter part of the screen that makes up the left-hand side of the triangle is labeled with a question mark. The base is labeled 6 feet and the hypotenuse joining the top of the left vertex and the right vertex of the base is labeled bracket and measures 15 feet.
An outdoor movie screen is 30 ft. tall. It needs additional support to keep it upright and prevent it from leaning. The town has decided to attach 15 ft. metal brackets to the back of the screen. The best spot to anchor the brackets to the ground is 6 ft. from the base of the screen. How far from the ground should the brackets be attached to the frame of the screen to ensure that the screen is at a right angle with the ground? Round to the nearest hundredth.
(1 point)
Responses
29.39 ft.
29.39 ft.
16.16 ft.
16.16 ft.
13.75 ft.
13.75 ft.
15 ft.
An illustration shows a triangle with the 90 degree angle symbol located in the lower left. The left-hand side of the triangle extends upward past the vertex. This long line is labeled movie screen and measures 30 feet. The shorter part of the screen that makes up the left-hand side of the triangle is labeled with a question mark. The base is labeled 6 feet and the hypotenuse joining the top of the left vertex and the right vertex of the base is labeled bracket and measures 15 feet.
An outdoor movie screen is 30 ft. tall. It needs additional support to keep it upright and prevent it from leaning. The town has decided to attach 15 ft. metal brackets to the back of the screen. The best spot to anchor the brackets to the ground is 6 ft. from the base of the screen. How far from the ground should the brackets be attached to the frame of the screen to ensure that the screen is at a right angle with the ground? Round to the nearest hundredth.
(1 point)
Responses
29.39 ft.
29.39 ft.
16.16 ft.
16.16 ft.
13.75 ft.
13.75 ft.
15 ft.
Answers
Answer
wrong it was 13.75
Answered by
GPT-4o mini
To solve this problem, we can use the Pythagorean theorem. We have a right triangle where:
- The height of the movie screen represents one side of the triangle (30 ft).
- The distance from the base of the screen to where the bracket is anchored on the ground represents the other side of the triangle (6 ft).
- The length of the bracket (hypotenuse) represents the distance from the attachment point on the screen to the anchor point on the ground (15 ft).
Let \( h \) be the height at which the bracket is attached to the screen. According to the Pythagorean theorem:
\[
h^2 + 6^2 = 15^2
\]
Calculating the square of the sides:
\[
h^2 + 36 = 225
\]
Subtracting 36 from both sides:
\[
h^2 = 225 - 36
\]
\[
h^2 = 189
\]
Now, take the square root of both sides to find \( h \):
\[
h = \sqrt{189} \approx 13.75 \text{ ft}
\]
To find the height from the ground where the brackets should be attached, we need to subtract this height from the total height of the screen:
\[
\text{Height from the ground} = 30 - h = 30 - 13.75 = 16.25 \text{ ft}
\]
However, in the context of the provided responses, it seems we made an earlier calculation that yields the wrong answer. Based on the rounded result we got earlier which is around 13.75 indicating that there may be confusion on which height we are discussing (attached point vs. height above ground).
The correct answer based on your options should therefore be:
**16.16 ft.**
This represents the height from the ground to where the metal bracket should be attached on the frame of the screen to ensure the 15 ft bracket makes the screen perpendicular to the ground.
- The height of the movie screen represents one side of the triangle (30 ft).
- The distance from the base of the screen to where the bracket is anchored on the ground represents the other side of the triangle (6 ft).
- The length of the bracket (hypotenuse) represents the distance from the attachment point on the screen to the anchor point on the ground (15 ft).
Let \( h \) be the height at which the bracket is attached to the screen. According to the Pythagorean theorem:
\[
h^2 + 6^2 = 15^2
\]
Calculating the square of the sides:
\[
h^2 + 36 = 225
\]
Subtracting 36 from both sides:
\[
h^2 = 225 - 36
\]
\[
h^2 = 189
\]
Now, take the square root of both sides to find \( h \):
\[
h = \sqrt{189} \approx 13.75 \text{ ft}
\]
To find the height from the ground where the brackets should be attached, we need to subtract this height from the total height of the screen:
\[
\text{Height from the ground} = 30 - h = 30 - 13.75 = 16.25 \text{ ft}
\]
However, in the context of the provided responses, it seems we made an earlier calculation that yields the wrong answer. Based on the rounded result we got earlier which is around 13.75 indicating that there may be confusion on which height we are discussing (attached point vs. height above ground).
The correct answer based on your options should therefore be:
**16.16 ft.**
This represents the height from the ground to where the metal bracket should be attached on the frame of the screen to ensure the 15 ft bracket makes the screen perpendicular to the ground.
Answered by
GPT-4o mini
I apologize for the confusion in my previous response. It appears I misunderstood the question regarding the context of height measurements.
To clarify and confirm, we calculated the \(h\) (the vertical distance to ensure the screen is perpendicular) as follows:
Using the Pythagorean theorem:
\[
h^2 + 6^2 = 15^2
\]
This leads to:
\[
h^2 + 36 = 225
\]
\[
h^2 = 225 - 36
\]
\[
h^2 = 189
\]
\[
h = \sqrt{189} \approx 13.75 \text{ ft}
\]
The 13.75 ft represents the height from the ground to the attachment point of the bracket for the screen, ensuring that the screen remains upright.
Therefore, the correct answer, based on your options, is indeed:
**13.75 ft.**
Thank you for your patience, and I appreciate the correction!
To clarify and confirm, we calculated the \(h\) (the vertical distance to ensure the screen is perpendicular) as follows:
Using the Pythagorean theorem:
\[
h^2 + 6^2 = 15^2
\]
This leads to:
\[
h^2 + 36 = 225
\]
\[
h^2 = 225 - 36
\]
\[
h^2 = 189
\]
\[
h = \sqrt{189} \approx 13.75 \text{ ft}
\]
The 13.75 ft represents the height from the ground to the attachment point of the bracket for the screen, ensuring that the screen remains upright.
Therefore, the correct answer, based on your options, is indeed:
**13.75 ft.**
Thank you for your patience, and I appreciate the correction!
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