3 years ago

What is the answer? What is the number of Y? Y/-3 = 1/6

Mathematics

1 answer:

qwelly [4]3 years ago

3 0

Answer:

Y = -1/2

Step-by-step explanation:

I hope it helps u

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A parabolic arch sculpture is on top of a city bank. A model of the arch is y = −0.005x2 + 0.3x where x and y are in feet.

o-na [289]

Answer:

A. a. 34.5 feet

b. 60 feet

Step-by-step explanation:

Parabola equation

$y=-0.005x^2+0.3x$

Differentiating with respect to x we get

$\dfrac{dy}{dx}=-0.01x+0.3$

Equating with zero

$-0.01x+0.3=0\\\Rightarrow -0.01x=-0.3\\\Rightarrow x=\dfrac{0.3}{0.01}\\\Rightarrow x=30$

Double derivative of the parabolic equation

$\dfrac{d^2y}{dx^2}=-0.01$

So, $x=30$ is maximum.

$y=-0.005\times 30^2+0.3\times 30\\\Rightarrow y=4.5$

So, the maximum height of the arch will be 4.5 feet.

From the ground the highest point of the arch will be $30+4.5=34.5\ \text{ft}$

We are taking the x axis as the width of the bank.

$0=-0.005x^2+0.3x\\\Rightarrow 0.005x^2=0.3x\\\Rightarrow x=\dfrac{0.3}{0.005}\\\Rightarrow x=60$

So, the width of the bank will be 60 feet.

7 0

3 years ago

What is the common ratio of the geometric sequence below? 10, 15, 22.5, 33.75

seraphim [82]

That ratio will be 15/10 = 1.5.

Check:
.. 22.5/15 = 1.5
.. 33.75/22.5 = 1.5

5 0

3 years ago

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Big points if you answer this

Tema [17]

Answer:

i think its A but im not 100 percnt sure

8 0

3 years ago

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Pls helppp (spam answers will be reported)

irina1246 [14]

Answer:

197×25)mm=4925

Step-by-step explanation:

multiply them v=lll

5 0

3 years ago

A survey indicates that there are approximately 120 dairy farms in a given area. If there are exactly 400 farms, and exactly 20%

inna [77]

Answer:

120 out of 400 does not equal 20%

it equals 30%

Step-by-step explanation:

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3 years ago

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