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3 years ago

What is your opinion that we should raise the drinking/smoking ages to 21?

2 answers:

8 0

In my opinion the ages for drinking/smoking should not be raised to 21. While I am not a fan of either and they almost never lead to good things, it just seems odd to me that a person can fight for his country at 18, but can't smoke or drink.

Julli [10]3 years ago

4 0

Yes, because most teenagers or early adults make bad choices. They should raise the age so when they are actual adults they can hopefully make the right decision.

Try looking on this website is you don't believe in my opinion. http://www.debate.org/opinions/should-the-smoking-age-be-raised-to-21

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Q6. (15 points) IQ examination scores of 500 members of a club are normally distributed with mean of 165 and SD of 15.

melamori03 [73]

Answer:

a) 0.8413

b) 421

c) $P_{95} = 189.675$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 165

Standard Deviation, σ = 15

We are given that the distribution of IQ examination scores is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P(IQ scores at most 180)

P(x < 180)

$P( x < 180) = P( z < \displaystyle\frac{180 - 165}{15}) = P(z < 1)$

Calculation the value from standard normal z table, we have,

$P(x < 180) = 0.8413 = 84.13\%$

b) Number of the members of the club have IQ scores at most 180

n = 500

$\text{Members} = n\times \text{P(IQ scores at most 180)}\\= 500\times 0.8413\\=420.65 \approc 421$

c) P(X< x) = 0.95

We have to find the value of x such that the probability is 0.95

$P( X < x) = P( z < \displaystyle\frac{x - 165}{15})=0.95$

Calculation the value from standard normal z table, we have,

$P(z < 1.645) = 0.95$

$\displaystyle\frac{x - 165}{15} = 1.645\\\\x = 189.675$

$P_{95} = 189.675$

8 0

3 years ago

Question 28 (1 point)

aniked [119]

Answer:

+ 16

Step-by-step explanation:

x² - 8x = - 10

to complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 4)x + (- 4) = - 10 + (- 4)²

x² - 8x + 16 = - 10 + 16

thus 16 is added to both sides to complete the square

4 0

2 years ago

81% of___ is 405<br> Pls help

motikmotik

Of means multiplication and Is means equals. So 0.81x =405
X = 500

3 0

3 years ago

Read 2 more answers

Solve.<br> -3/4- 4/3 = <br> Aswdfeghrjkt

Ghella [55]

-25/12

You have to change the denominator the the least common multiple then multiply the numerator by the number you multiplied it’s denominator with.

6 0

3 years ago

Read 2 more answers

Unit rates! PLZ HELP WILL GIVE BRAINIEST!!

Alchen [17]

Answer:

The answer is $10.32aprox

Step-by-step explanation:

I hope it will help u

Please mark me as brainlist

3 0

3 years ago