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Darya [45]
3 years ago
8

A parking lot in the shape of a trapezoid has an area of 12,0521 square meters the length of the other base is 108.6 meters. Wha

t is the width of the parking lot
Mathematics
1 answer:
andreev551 [17]3 years ago
5 0

Please consider the complete question.

A parking lot in the shape of a trapezoid has an area of 12,052.1 square meters. The length of one base is 82.4 meters and the length of the base is 108.6 meters. What is the width of the parking lot

We will use area of trapezoid to formula to solve our given problem.

\text{Area of trapezoid}=\frac{1}{2}(a+b)\times h, where

a and b represents parallel sides of trapezoid,

h = height of trapezoid.

Width of the trapezoid will be equal to height.

Upon substituting our given values in above formula, we will get:

12,052.1=\frac{1}{2}(82.4+108.6)\times h

12,052.1\cdot 2=2\cdot \frac{1}{2}(82.4+108.6)\times h

24104.2=(191)\times h

\frac{24104.2}{191}=\frac{(191)\times h}{191}

126.2=h

Therefore, the width of the parking lot is 126.2 meters.

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Let k(w)= w+3/w+9. Find k^-1(-4)
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Answer:

\displaystyle k^{-1} (-4) = -\frac{39}{5}

Step-by-step explanation:

We are given the function:

\displaystyle k(w) = \frac{w + 3}{w + 9}

And we want to find k⁻¹(-4).

Recall that by the definition of inverse functions:

\displaystyle \text{If } f(a) = b, \text{ then } f^{-1}(b) = a

Let k⁻¹(-4) = <em>x, </em>where <em>x</em> is an unknown value. Then by definition, k(x) must equal -4.

So:

\displaystyle k(x) = \frac{x+3}{x+9} = -4

Solve for <em>x: </em>

\displaystyle \begin{aligned} \frac{x+3}{x+9} &= -4 \\ \\ x+3 &= -4(x+9) \\ \\ x+3 &= -4x - 36 \\ \\ x &= -\frac{39}{5} \end{aligned}

Hence, k(-39/5) = -4. By definition of inverse functions, then, k⁻¹(-4) = -39/5.

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3 years ago
What is true of a geometric plane?
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A geometric plane is two-dimensional. Standing at one point in the plane and picking two directions to travel which are not opposites of one another, any direction of travel on the plane can be obtained by composing these two directions. Since it is two directions, the plane is two-dimensional
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WXYZ is a kite, find the measure of WX.
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15^2 + 7^2 = 225 + 45 = 274

WX = √274 = 16.55

Answer

WX = 16.55 units

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Use the fact that the mean of a geometric distribution is μ= 1 p and the variance is σ2= q p2. A daily number lottery chooses th
butalik [34]

Answer:

a). The mean = 1000

     The variance = 999,000

     The standard deviation = 999.4999

b). 1000 times , loss

Step-by-step explanation:

The mean of geometric distribution is given as , $\mu = \frac{1}{p}$

And the variance is given by, $\sigma ^2=\frac{q}{p^2}$

Given : $p=\frac{1}{1000}$

             = 0.001

The formulae of mean and variance are :

$\mu = \frac{1}{p}$

$\sigma ^2=\frac{q}{p^2}$

$\sigma ^2=\frac{1-p}{p^2}$

a). Mean =   $\mu = \frac{1}{p}$

              = $\mu = \frac{1}{0.001}$

              = 1000

  Variance =   $\sigma ^2=\frac{1-p}{p^2}$

                  = $\sigma ^2=\frac{1-0.001}{0.001^2}$

                           = 999,000

   The standard deviation is determined by the root of the variance.

    $\sigma = \sqrt{\sigma^2}$

        = $\sqrt{999,000}$ = 999.4999

b). We expect to have play lottery 1000  times to win, because the mean in part (a) is 1000.

When we win the profit is 500 - 1 = 499

When we lose, the profit is -1

Expected value of the mean μ is the summation of a product of each of the possibility x with the probability P(x).

$\mu=\Sigma\ x\ P(x)= 499 \times 0.001+(-1) \times (1-0.001)$

  = $ 0.50

Since the answer is negative, we are expected to make a loss.

4 0
3 years ago
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