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vivado [14]
2 years ago
6

A rectangular park, with dimensions of 1500 feet by 2000 feet, has a diagonal walking path that goes from the top northeast corn

er to the bottom southwest corner. How long is the walking path? A) 250 feet B) 2500 feet C) 3500 feet D) 5,000 feet
Mathematics
2 answers:
dezoksy [38]2 years ago
7 0

Answer:

The length of diagonal is 2500 feet.

Step-by-step explanation:

Given a rectangular park, with dimensions of 1500 feet by 2000 feet, has a diagonal walking path that goes from the top northeast corner to the bottom southwest corner.

we have to find the length of walking path i.e of diagonal.

As all angles of rectangle are of 90° and we have to find the length of diagonal.

∴ By Pythagoras theorem

(Diagonal)^2=(Length)^2+(Breadth)^2\\\\(Diagonal)^2=(2000)^2+(1500)^2\\\\(diagonal)^2=4000000+2250000\\\\diagonal=\sqrt{6250000}=2500 feet

Hence, the length of diagonal is 2500 feet.

Mariana [72]2 years ago
6 0
B I hope it’s right
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e) In 2017, find

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A manufacturing company builds construction machinery. It sells 10 machines for $18,100 and 20 machines for $26,600. Which equat
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<h3>Answer:</h3>

D. R(x) = 850x +9600

<h3>Step-by-step explanation:</h3>

Selling 10 more machines increased revenue from $18100 to $26600, an increase of ...

... $26,600 -18,100 = $8,500

That is, the revenue increased by $8500/10 = $850 per machine.

Only one answer choice has this number in it:

... D. R(x) = 850x+9600

_____

<em>Check</em>

R(10) = 850·10 +9600 = 8500 +9600 = 18,100 . . . . OK

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<em>Comment on answer selection</em>

On multiple-choice questions, it is rarely necessary to work out the solution to the problem completely. Usually, it is sufficient to find the one number that discriminates between correct and incorrect answers.

In real life, answers are rarely multiple-choice. You are required to work the problem completely and to figure out how to tell if your answer is correct.

Here, we have worked the problem far enough to find the slope, the amount by which revenue increases when sales increases by 1 unit. The intercept can be found different ways. One of them is to see what number makes the revenue match for one of the "x" values:

... R(10) = 850·10 +b = 18100

... b = 18100 -8500 = 9600

so ...

... R(x) = 850x +9600

We can check this answer by computing R(20), as we have above.

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