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3 years ago

Please help me with this one :)

Mathematics

2 answers:

Gwar [14]3 years ago

7 0

let us find 35% of each.

1. Fred

35% of 80 = 0.35*80 = 28

2. Marla

35% of 90= 0.35*90=31.5

3. Juana

35% of 100 =0.35*100 =35

So answer is Juana ( option H)

stealth61 [152]3 years ago

3 0

Every body spent same amount $ 35

the 35 % of the earning = spent amount

Earning = spent amount * 100

---------------------------

so earning = 35 * 100

-------------

Earning = 100 $

Answer is Juana .

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The lengths of lumber a machine cuts are normally distributed with a mean of 106 inches and a standard deviation of 0.3 inch. (

Vinvika [58]

Answer:

a) $P(X>106.11)=P(\frac{X-\mu}{\sigma}\frac{106.11-106}{0.3})=P(z>0.37)$

And we can find this probability with the complement rule:

$P(z>0.37)=1-P(z$

b) $z =\frac{106.11- 106}{\frac{0.3}{\sqrt{44}}}= 2.431$

And if we use the z score we got:

$P(z>2.431) =1-P(z$

Step-by-step explanation:

Let X the random variable that represent the lengths of a population, and for this case we know the distribution for X is given by:

$X \sim N(106,0.3)$

Where $\mu=106$ and $\sigma=0.3$

Part a

We are interested on this probability

$P(X>106.11)$

And we can use the z score formula given by:

$z=\frac{x-\mu}{\sigma}$

And using this formula we got:

$P(X>106.11)=P(\frac{X-\mu}{\sigma}\frac{106.11-106}{0.3})=P(z>0.37)$

And we can find this probability with the complement rule:

$P(z>0.37)=1-P(z$

Part b

For this case we select a sample of n =44 and the new z score formula is given by:

$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score we got:

$z =\frac{106.11- 106}{\frac{0.3}{\sqrt{44}}}= 2.431$

And if we use the z score we got:

$P(z>2.431) =1-P(z$

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2 years ago

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Answer:

Step-by-step explanation:

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son4ous [18]

Answer:

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Step-by-step explanation:

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l = √(6² + 6²) = 6√2

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Area = bh/2

b = 12 m

h = 6√2

Area = (12 * 6√2)/2 = 36√2

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Lateral surface area of square pyramid = 4 * area of triangle

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Answer:

Step-by-step explanation:

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