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Brums [2.3K]
2 years ago
14

The graph of a quadratic relationship is in the shape of a parabola. Parabolas are symmetric arcs and are useful for modeling re

lationships such as the height of a projectile over time or the curve of the cables on a suspension bridge.
Think about where you have seen a parabolic arc in real life. What unique features did it have, and where did you see symmetry in the relationship?
Mathematics
1 answer:
zhuklara [117]2 years ago
6 0

Answer:

  • The arcs on the Golden Gate Bridge.

Explanation:

I think about the Golden Gate Bridge, which is a suspension bridge.

As in any suspension bridge, a long cable is supported by two large supports.

The cable falls from a support, in the form of a curve concave upwards, to a minimum point that is the vertex of the<em> parabola</em>, through which the axis of <em>symmetry</em> passes, and curves again upwards to ascend to the upper end of the other support.

As a <em>unique feature</em> of this parabolic arc you can tell that the the concavity is upward; the parabola open upward.

Also, you can tell that the parabola is vertical, which means that the axis of symmetry is vertical.

The <em>symmetry</em> is clear because to the curve to the left of the vertex is a mirror image of the curve to the right of the vertex.

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Lorena calculated the slope of the linear function that is represented by the table of values as shown. x y –10 15 –8 27 –6 39 –
Anvisha [2.4K]

She made a mistake when she subtracted x1 from x2.

Step-by-step explanation:

Step 1 :

a)

The formula used by Lorena to calculate the slope between 2 points is correct

So the statement given in option 1 is not the reason for her mistake

Step 2:

b)

She has taken the fourth and fifth point and correctly used the x and y co ordinates to calculate the slope

Hence the statement in second option is not true

Step 3:

c)

While calculating the slope the denominator is -2 - (-4) . This gives 2 as the answer. But she has made a mistake in this subtraction giving -6 as the answer.

Hence she has made a mistake in subtracting x1 from x2 and this statement is true

Step 4:

d)

She has not made any mistake in subtracting y1 from y2. Hence this statement is not true

4 0
2 years ago
Read 2 more answers
Mr.Foote placed a cement walk along the side of his house. The walk if 18 inches wide and 32 feet long. What was the cost of the
Sonja [21]

we know that

1 ft-------> is equal to 12 in


step 1

find the area of the walk

18 in wide--------> convert to ft

18/12=1.5 ft

area=1.5*32------> 48 ft²


step 2

find the cost at $2.10 a square foot

multiply 48 ft² by $2.10

48*2.1=$100.80


therefore


the answer is

$100.80


5 0
2 years ago
A rectangle is 2 inches longer than it is wide. Numerically, its area exceeds its perimeter by 20. Find the perimeter. _________
AnnyKZ [126]

Answer:28

Step-by-step explanation: 6 x 8 = 48 6+6+8+8=28

7 0
2 years ago
A survey asked eight people about their wages and educational background. The table shows the hourly wages reported by people wi
olganol [36]

Answer:

1:1.25      2: 1.5    3: clusterd around

Step-by-step explanation:

i am smarte

5 0
2 years ago
Read 2 more answers
The population P(t) of a species satisfies the logistic differential equation dP/dt= P(2-(P/5000)) where the initial population
Elis [28]
A logistic differential equation can be written as follows:
\frac{dP}{dt} = rP[1- \frac{P}{K}]

where r = growth parameter and K = carrying parameter.

In order to write you equation in this form, you have to regroup 2:
\frac{dP}{dt} = 2P[1- \frac{P}{10000}]

Therefore, in you case r = 2 and K = 10000

To solve the logistic differential equation you need to solve:

\int { \frac{1}{[P(1- \frac{P}{K})] } } \, dP =  \int {r} \, dt

The soution will be:

P(t) = \frac{P(0)K}{P(0)+(K-P(0)) e^{-rt} }

where P(0) is the initial population.

In your case, you'll have:

P(t) = <span>\frac{3E7}{3E3+7E3 e^{-2t} }

Now you have to calculate the limit of P(t).
We know that
</span>\lim_{t \to \infty}  e^{-2t} -\ \textgreater \  0  &#10;

hence,

\lim_{t \to \infty} P(t) =  \lim_{t \to \infty}  \frac{3E7}{3E3+0} =  10^{4}<span>

</span><span>

</span>
5 0
2 years ago
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