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1 year ago

Please help y∝1/√x If y=5 when x=36 find, x when y=3

Mathematics

2 answers:

Fittoniya [83]1 year ago

6 0

Answer:

Step-by-step explanation:

5=k× $\frac{1}{36}$

k=180

3=180× $\frac{1}{x}$

x=60

Nat2105 [25]1 year ago

6 0

Answer:

x = 100.

Step-by-step explanation:

y ∝ 1/√x

y = k /√x where k is a constant.

When x = 36 y = 5 so we have:

5 = k / √36

5 = k / 6

k = 30

So we have the relation:

y = 30 /√x

When y = 3

3 = 30/ √x

√x = 30/3 = 10

x= 100.

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1 year ago

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Based on the Central Limit Theorem:

$\displaystyle\sum_{i=1}^{400}Y_i\~{}N(400\times 0.473, \sqrt{400}\times 0.499)=\displaystyle\sum_{i=1}^{400}Y_i\~{}N(189.2; 9.98)$

$P(\displaystyle\sum_{i=1}^{400}Y_i=1)\~{=}P(0.5$

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