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fiasKO [112]
3 years ago
12

Look at the picture of a scaffold used to support construction workers. The height of the scaffold can be changed by adjusting t

wo slanting rods, one of which, labeled PR, is shown:
A support structure is shown in which a right triangle PQR is formed with the right angle at Q. The length of PQ is shown as 14 feet, and the length of QR is shown as 9 feet..

Part A: What is the approximate length of rod PR? Round your answer to the nearest hundredth. Explain how you found your answer stating the theorem you used. Show all your work. (5 points)

Part B: The length of rod PR is adjusted to 18 feet. If width PQ remains the same, what is the approximate new height QR of the scaffold? Round your answer to the nearest hundredth. Show all your work. (5 points)

Mathematics
1 answer:
timama [110]3 years ago
5 0

Step-by-step explanation:

<u>Using Pythagorus theorem</u> :

(A)

PR =  \sqrt{ {PQ}^{2}  +  {QR}^{2} }

PR =   \sqrt{196 + 81}  =  \sqrt{277}  = 16.64 \: cm

(B)

QR  =   \sqrt{ {PQ}^{2}  +  {PR}^{2} }  =  \sqrt{196 +324 }  = 22.8 \: cm

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Given:

\sqrt{2}=1.414

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\sqrt{50}+\sqrt{72}

It can be rewritten as

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=\sqrt{2}\times \sqrt{25}+\sqrt{2}\times \sqrt{36}        [\because \sqrt{ab}=\sqrt{a}\sqrt{b}]

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2 years ago
What are the coordinates of the midpoint of the segment with endpoints at (-3, -4) and (5, 8)?
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Answer:

(4, ``6)

Step-by-step explanation:

The midpoint formula is

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So, (5-(-3)/2, 8-(-4)/2)

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3 years ago
Marilyn has two credit cards, D and E. Card D has a balance of $691. 64, and Card E has a balance of $1,014. 22. The minimum mon
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By using basic concept of percentage we got that minimum payment on Card E is 0.77 than on Card D.

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To learn more about Percentage  visit : brainly.com/question/19247356

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