A helicopter landing pad has a length of 80 ft and a width of 50 ft. A safety zone
of uniform width, which is not to be entered during landing, surrounds the landing
pad. The landing pad and safety zone together have a combined area of 10800 ft2,
what is the uniform width (safety zone) around the landing pad?

Answers

Answer 1

Answer:

uniform width around the landing pad = 9.41 feet

Step-by-step explanation:

Length of landing pad = 80 ft

width of landing pad = 50 ft

Length of safety zone = (80 + 2w)

width of safety zone = (50 + 2w)

Total area = 10800 [tex]ft^{2}[/tex]

Area of landing pad = length x width

                                  = 80 x 50

                                  = 4000 [tex]ft^{2}[/tex]

Area of landing pad = 4000 [tex]ft^{2}[/tex]

Thus,

area of safety zone = total area - area of landing pad

                                 = 10800 - 4000

                                 = 6800

area of safety zone = 6800 [tex]ft^{2}[/tex]

But,

area of safety zone = length x width

6800 = (80 + 2w) x (50 + 2w)

6800 = 4000 + 160w + 100w + 4[tex]w^{2}[/tex]

divide through by 4,

1700  = [tex]w^{2}[/tex] + 65w + 1000

⇒ [tex]w^{2}[/tex] + 65w + 1000 - 1700 = 0

[tex]w^{2}[/tex] + 65w -700 = 0

Applying the quadratic formula,

w = (-b ± [tex]\sqrt{b^{2} -4ac}[/tex]) ÷ 2a

a = 1, b= 65 and c = -700

w = (-65 ± [tex]\sqrt{(65)^{2}-(4*1*-700) }[/tex]) ÷ 2

   = (-65 ± [tex]\sqrt{7025}[/tex]) ÷ 2

   = (-65 ± 83.82)÷ 2

w = (-65 + 83.82) ÷ 2 OR (-65 - 83.82) ÷ 2

   = 18.82 ÷ 2 OR -148.82 ÷ 2

   = 9.41 OR -74.41

Thus, w = 9.41 ft.  


Related Questions

If x = 2 and y = 5 , evaluate the following expression:
100 − 3 ( 3 y − 4 x )

Answers

Answer:

-59

Step-by-step explanation:

Answer:

e

Step-by-step explanation:

Jenny has some flowers in a bucket. She picks a flower at
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flowers at random.
Are these two events dependent or independent

Answers

The events are independent because it doesn’t matter if you take a flower out the next flower you pick will not matter as it’s still a flower and it’s not talking about colour

As a retiring employee, you'll receive 8.96% of your average salary from the last five years you worked with your company.

You plan to retire after 36 years with the company.

Your salaries for your last five years are:

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Answer:

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Step-by-step explanation:

is the correct answer

134,820 is correctooo!

What equation models the data in the table if d = number of days and c = cost?

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Answer: pick the fourth answer
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Marcus paid for 5 pairs of rare Jordan's to be delivered. Each pair cost $143.95. Marcus paid $74.25 for delivery. What is the total amount Marcus paid?

Answers

Answer:

$794.10

Step-by-step explanation:

Marcus paid for 5 pairs of rare Jordan's to be delivered. Each pair cost $143.95. Marcus paid $74.25 for delivery. What is the total amount Marcus paid?

The total amount Marcus paid is calculated as

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Where p = Number of pairs of rae Jordans delivered = 5

Hence,

A = $143.95 × 5 + $74.35

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Therefore, the total amount Marcus paid is $794.10

A TV has a listed price of $ 796-99 before tax. If the sales tax rate is 6.75% find the total cost of the TV with sales tax included
Round your answer to the nearest cent, as necessary

Answers

Answer:

$850.79

Step-by-step explanation:

Assuming "$ 796-99" meant $796.99

796.99 increase 6.75% =

796.99 × (1 + 6.75%) = 796.99 × (1 + 0.0675) = 850.786825

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Answer:

Attached a pic!!

Hope it helps!!!!

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Answers

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what is the nth term rule of the linear sequence below 22,18,14,10,6

Answers

Answer: -10

Step-by-step explanation:

We can see there is a pattern of -4 each time

1:22

2:18

3:14

4:10

5:6

6:2

7:-2

8:-6

9:-10

Answer:

1. 22 - 4 = 18

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Step-by-step explanation:

The question did not state which term specifically you wanted, so here is 1-10, if its higher than that, then i can update my answer.

Have a good day.

Determine whether the expression is a polynomial. If it is a polynomial, find the degree
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Answers

Answer:

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Please help me on this!!!! ​

Answers

Answer:

670

Step-by-step explanation:

umm i used a calculator

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Answers

Answer:

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Explanation:

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What is Linear Inequalities?

Linear inequalities are defined as those expressions which are connected by inequality signs like >, <, ≤, ≥ and ≠ and the value of the exponent of the variable is 1.

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That is the inequality representing this situation is,

x > 12

Hence the required inequality is x > 12.

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Answers

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What is Multiplication?

The adding of groups is called as Multiplication. When we multiply, the number of things in the group increases.

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For this let us multiply numerator and denominator by 2.

So we get 1264368/2

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Answers

I do believe it’s -1/3
If I’m correct mark me brainliest pls
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Answers

The answer is no (all you do it plug in the point that correspond with the x and y, in the equation

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Answers

Answer:

6

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

Make me brainliest

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Step-by-step explanation:

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Answers

Hey there!

3^2 + 7 • 2

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Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

Answer:

my

Step-by-step explanation:

the diameter of the handle of a softball bat is 1 3/4 inches. whats is the length in inches of the diameter of 8 of these bat handles?

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Answers

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Answer:

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Step-by-step explanation:

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Answers

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ما انه | با
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Answer:

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Step-by-step explanation:

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So we're working on ratios and proportions in my math class. I feel attacked because my teacher specifically called me out and said- "Nya, you can do this, a little math won't hurt." So now I need help. :')

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Answers

A pizza cost 12.00. If the sales tax is 7%, what is the final price of the pizza?

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Answers

Answer:

[tex]\displaystyle \sin(D)=\frac{28}{53}\approx0.5283[/tex]

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Step-by-step explanation:

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For D, the opposite side to D is 28, and the hypotenuse is 53. Therefore:

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Or, in decimal form:

[tex]\sin(D)\approx 0.5283[/tex]

Likewise, the side opposite to E is 45, and the hypotenuse is 53. Therefore:

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i will mark you as brainly plzzzz help
A shirt is sold for Rs 285, there is a loss of 5%. At what price should the shirt be sold so as to have a profit of 15%?

Answers

Answer:

345 !

Step-by-step explanation:

SP = 285

loss = 5 %

CP= ( SP * 100 ) / ( 100 -  percentage loss)

CP= 28500 / 95 = 300

~~~~~~~~~~~~~~```

CP= 300

profit = 15%

SP = [(100 +  Profit %) / 100]*CP.

SP= 100 + 15 / 100 x 300

  =  115 / 100 x 300

 = 345

I hope im right!!!

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Answers

Answer:

1.5

Step-by-step explanation:

Answer:

1/8 or 0.125

Step-by-step explanation:

what are the y-intercepts to graph the equation-4x - 3y = 36

Answers

Answer:

Y-Int = -12

Step-by-step explanation:

First, I would change the equation to slope intercept form:

-3y = 36 + 4x

3y = -36 - 4x

y = -12-4/3x

y = -4/3x - 12

-12 is the y-intercepts to graph the equation-4x - 3y = 36

What is slope intercept form of line?

The slope intercept form of a line is y=mx+b, where m is slope and b is the y intercept.

The given equation is -4x-3y=36

Now let us convert the given equation to slope intercept form y=mx+b

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Isolate the term y

-3y=36+4x

Divide both sides by 3

-y=36/3+4/3x

Multiply both sides by -

y=-12-4/3x

y=-4/3x-12

Slope is -4/3 and y intercept is -12

Hence, -12 is the y-intercepts to graph the equation-4x - 3y = 36

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Jose bought a new car 2 years ago for $18,000. The value of his car decreased exponentially by 17% and is now
valued at about $12,400.
Solve Part A please

Answers

Answer: D

Step-by-step explanation: On the first part, if it decreases by 17% each year, that means its value is 83% of what it was. You forgot to say that the car was bought 2 years ago.

Thus, the answer is D

For the second, just use the same logic to get 18000*0.75^4

(1a) Do 4x and 15 + x have the same value when x is 5? How do you know?

Answers

Answer:

Yes, both have the same value ( 20) when x = 5.

Step-by-step explanation:

We have two functions:

y = 15 + x

y = 4*x

We want to see if these functions have the same value when x = 5.

Then we just need to replace x by 5 in both equations, and see if the values of y are the same

first function:

y = 15 + 5 = 20

second function:

y = 4*5 = 20

So yes, both functions are equal to 20 when x = 5.

Answer:

Yes.

Step-by-step explanation:

4(5)=20

15+5=20

4/5 + 6/10. Im sorry im just to lazy-

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Answer:

1 2/5

Step-by-step explanation:

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Answer:

I attached the photo hoped it helped

Step-by-step explanation:

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