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xxMikexx [17]
1 year ago
12

Morgan is walking her dog on an 8-meter-long leash. She is currently 500 meters from her house, so the maximum and minimum dista

nces that the dog may be from the house can be found using the equation |x – 500| = 8. What are the minimum and maximum distances that Morgan's dog may be from the house?
Mathematics
1 answer:
algol [13]1 year ago
5 0

Answer: The minimum and maximum distances that Morgan's dog may be from the house are 508 meters and 492 meters.

Step-by-step explanation:

Hi, to answer this question we have to solve the given equation: |x – 500| = 8.

The modulus can take a positive value (x - 500) or a negative value (-x+500).

  • <em>For the positive value: </em>

x -500 = 8

x = 8+500

x =508

  • <em>For the negative value: </em>

- (x -500) =8

-x +500 =8  

500 -8 = x

492 =x

So, the minimum and maximum distances that Morgan's dog may be from the house are 508 meters and 492 meters.

Feel free to ask for more if needed or if you did not understand something.

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Ryan conducted a 6-day study observing the effects of an organic plant food on the growth of his sprouting bean plant. He tracke
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Answer:

The relationship is a function because only one amount of plant food remains each day

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
1. A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1500 hours. A homeowner selects 40 bulbs and finds t
IRINA_888 [86]

Answer:

(1) Sample mean is 1480 hours and population standard deviation is 80 hours

(2) Null hypothesis: The mean lifetime of its fluorescent bulbs is 1500 hours

Alternate hypothesis: The mean lifetime of its fluorescent bulbs is less than 1500 hours

(3) 1.645

(4) D

(5) B

(6) A

Step-by-step explanation:

(1) From the population parameter, the sample mean is 1480 hours and population standard deviation is 80 hours

(2) The null hypothesis is statement deduced from the population parameter which is tested to be true or false

The alternate hypothesis is also a statement from the population parameter that negates the null hypothesis

(3) Using the standard normal distribution table, the critical value of one tailed test with significance level of 0.05 is 1.645

(4) Z = (sample mean - population mean)/(sd/√n)

sample mean = 1480, population mean = 1500, sd = 80, n = 40

Z = (1480 - 1500)/(80/√40) = -20/12.65 = -1.58

(5) The null hypothesis is rejected because the test statistic -1.58 is less than the critical value 1.645

(6) There is not enough evidence to support the claim that the mean lifetime of its fluorescent bulbs is 1500 hours because the null hypothesis is rejected

5 0
2 years ago
Caleb’s school is five blocks due north of his home, and the library is two blocks due west of his home. If each city block is a
Ilia_Sergeevich [38]

Answer:

The closest straight-line distance from Caleb's school to the library is:

  • <u>1480.92 feet</u>

Step-by-step explanation:

Imagine a triangle, where five blocks are a side and two blocks another side, to obtain the closest straight-line distance from Caleb's school to the library you can use the Pythagoras theorem, where the hypotenuse is the closest straight-line:

  • perpendicular^{2} +base^{2} =hypotenuse^{2}

Clearing the hypotenuse is:

  • \sqrt{perpendicular^{2}+base^{2}}= hypotenuse

Now, you only need to identify the distance in each case:

Five blocks = 275 feet * 5 = 1375 feet.

Two blocks = 275 feet * 2 = 550 feet.

At last, you must replace the distances found in the equation cleared:

  • \sqrt{1375 feet^{2}+550 feet^{2}}= hypotenuse
  • <u>Hypotenuse or closest straight-line = 1480.92 feet</u>.

Identifying this, the closest straight-line distance from Caleb's school to the library is <u>1480.92 feet</u>.

4 0
2 years ago
This description assumes the elliptic object is centered at (0, 0). However, since the elliptic object is not fixed, initially i
yKpoI14uk [10]

Complete Question

The complete question is shown on the first and second uploaded image

Answer:

The derived h = \frac{b^{2} - 2a^{2}  }{2a^{2}}

Step-by-step explanation:

Step One : Consider the ellipse in equilibrium.

Looking at the ellipse in equilibrium i.e when the ellipse has settled down on the concave support (represented by a parabola ) as shown on the third uploaded image.

Step Two : Consider the ellipse equation.

Generally the equation of the ellipse is given as

                       \frac{x^{2}}{a^{2}} + \frac{(y-h)^{2}}{b^{2}}\\

Also the base on which it rest at equilibrium i.e the parabola is represented by     y = x^{2} -1

Substituting the value of y in the ellipse equation we have

        \frac{x^{2}}{a^{2}}+ \frac{(x^{2}-1-h)^{2}}{b^{2}}=1

Let x^{2} = t

So the equation becomes

                 \frac{t}{a^{2}} + \frac{(t -1 -h)^{2}}{b^{2}} =1

Rearranging, we get :

       a^{2} t^{2} + (b^{2}- 2a^{2}(h +1))t + a^{2}((h +1 )^{2} -b^{2} =0

This equation above is a quadratic equation or a bi-quadratic equation in x as t = x^{2}

Step Three : Relate the equation an the graph on the third uploaded image  

We can see that from the graph , if A and B are the two values of x for which the points is made , then A + B = 0 (because they are symmetric in nature)

From Vieta's Roots(Vieta's formula  is a formula that shows the relationship between the coefficients of a polynomial and the sum of its roots )

ax^{2} + bx + c =0

with A and B as roots

A+B = \frac{-b}{a}

But A + B = 0

So  \frac{-b}{a}   = 0

 or we can say that

              \frac{b^{2} - 2a^{2}(h +1 )}{a^{2}}

Rearranging we get

                        h = \frac{b^{2}- 2a^{2}}{2a^{2}}

5 0
2 years ago
Find the area and circumference of the following circle. (Round answer to the nearest hundredth.) r = 4.5 cm area = cm2 circumfe
FinnZ [79.3K]

Circumference = C = 28.26 cm

Area = A = 63.585 cm^2

Step-by-step explanation:

Given

Radius = r = 4.5 cm

Circumference:

C = 2\pi r

Putting the values

C = 2 * 3.14 * 4.5\\= 28.26\ cm

Area:

A = \pi r^2\\= 3.14 * (4.5)^2\\=3.14 * 20.25\\=63.585\ cm^2

Hence,

Circumference = C = 28.26 cm

Area = A = 63.585 cm^2

Keywords: Circle, area

Learn more about circle at:

  • brainly.com/question/10879401
  • brainly.com/question/10940255

#LearnwithBrainly

5 0
2 years ago
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