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3 years ago

8

The price of a train ticket from Orlando to New York is normally $171.00. However, children under the age of 16 receive a 25% di

scount. Find the sale price for someone under the age of 16.

2 answers:

lys-0071 [83]3 years ago

7 0

The sale price I believe would be 128.24

Pachacha [2.7K]3 years ago

3 0

I have no idea but i really tried hard

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Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 20. Find the prob

Ipatiy [6.2K]

Answer:

Randomly selected adult has an IQ less than 136 is 0.9641

Step-by-step explanation:

It is given that, it is normal distribution with mean 100 and SD as 20.

So, let's use the formula of z-score

z= $\frac{x-mean}{SD}$

For this problem,

x= 136

Plug in this value into the formula

z-score= $\frac{136-100}{20}$

=1.8

Now, use z-score table to find the probability

Find the corresponding value for the row 1.8 and the column 0.00, we do get 0.9641

So, Randomly selected adult has an IQ less than 136 is 0.9641

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3 years ago

A bottled water distributor wants to determine whether the mean amount of water contained in 1-gallon bottles purchased from a n

mash [69]

Answer:

We fail to reject H0; Hence, we conclude that there is no significant evidence that the mean amount of water per gallon is different from 1.0 gallon

Pvalue = - 2

(0.98626 ; 1.00174)

Since, 1.0 exist within the confidence interval, then we can conclude that mean amount of water per gallon is 1.0 gallon.

Step-by-step explanation:

H0 : μ= 1

H1 : μ < 1

The test statistic :

(xbar - μ) / (s / sqrt(n))

(0.994 - 1) / (0.03/sqrt(100))

-0.006 / 0.003

= - 2

The Pvalue :

Pvalue form Test statistic :

P(Z < - 2) = 0.02275

At α = 0.01

Pvalue > 0.01 ; Hence, we fail to reject H0.

The confidence interval :

Xbar ± Margin of error

Margin of Error = Zcritical * s/sqrt(n)

Zcritical at 99% confidence level = 2.58

Margin of Error = 2.58 * 0.03/sqrt(100) = 0.00774

Confidence interval :

0.994 ± 0.00774

Lower boundary = (0.994 - 0.00774) = 0.98626

Upper boundary = (0.994 + 0.00774) = 1.00174

(0.98626 ; 1.00174)

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3 years ago

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So what’s the question? What are we trying to find?

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Answer:4

Step-by-step explanation: please just trust me!

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3 years ago

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Ivanshal [37]

Answer:

See below

Step-by-step explanation:

<h3>Q13</h3>

The greater the angle the greater the opposite side

<u>Sides in ascending order:</u>

AB = 17, AC = 18, BC = 21

<u>Angles in same order</u>

∠C, ∠B, ∠A

<h3>Q14</h3>

<u>As above, sides in ascending order:</u>

AB = 15, AC = 16, BC = 17

<u>Angles in same order</u>

∠C, ∠B, ∠A

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x = 76°

<h3>Q16</h3>

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x + x = 158°
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<h3>Q17</h3>

<u>Same subject</u>

m∠QSR = m∠QPS + m∠PQS
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3 years ago