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STatiana [176]
3 years ago
15

According to an​ almanac, 70​% of adult smokers started smoking before turning 18 years old. ​(a) if 200 adult smokers are rando

mly​ selected, how many would we expect to have started smoking before turning 18 years​ old? ​(b) would it be unusual to observe 160 smokers who started smoking before turning 18 years old in a random sample of 200 adult​ smokers? why?
Mathematics
1 answer:
Strike441 [17]3 years ago
3 0

Solution: ​(a) if 200 adult smokers are randomly​ selected, how many would we expect to have started smoking before turning 18 years​ old?

Answer: It is expected that in a random sample of 200 adult smokers, 0.70 (200)=140 will have started smoking before turning 18.

​(b) would it be unusual to observe 160 smokers who started smoking before turning 18 years old in a random sample of 200 adult​ smokers? why?

Answer: Yes, it would be unusual to observe 160 smokers who started smoking before turning 18 years old in a random sample of 200 adult​ smokers, because 160 is greater than μ + 2σ

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How can I find the three iterations of 3^(x)= 2^(-x)+4
DIA [1.3K]

After factorizing the given equation, we can find the three iterations by putting the consecutive values of x.

The given equation is 3∧x = 2∧(-x) + 4. We can modify it as shown below:

Take logarithm on both the sides

log(3∧x) = log[2∧(-x) + 4]

xlog3 = log[2∧(-x) + 4]

x = log[2∧(-x) + 4] / log3

For the first iteration, put x = 1

x = log[2∧(-1) + 4] / log3

x = log4.5 / log3

x = 0.477

For the second iteration, put x = 2

x = log[2∧(-2) + 4] / log3

x = log4.25 / log3

x = 0.477

For the third iteration, put x = 3

x = log[2∧(-3) + 4] / log3

x = log4.125 / log3

x = 0.477

So, this is how we can find three iterations.

For more explanation about iterations, refer the following link:

brainly.com/question/14828536

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5 0
2 years ago
Stephanie had seven add an 8 pound of bird seed she use three out of 8 pound to fill a bird feeder f Stephanie had 7 pound of bi
natulia [17]
So if I understand correctly, she had 7 1/8 pounds of birdseed and used 3/8 pound.
Convert the 7 1/8 to an improper fraction [(8*7)+1]/8 =57/8
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If she had 7 pounds of birdseed and used 3/8 pounds, you need to find a common denominator to subtract if you can't do it in your head. 8 would be the common denominator, so:
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A reflection is a type of transformation in which a figure is: Flipped OR Turned
klasskru [66]

Answer:

flipped

Step-by-step explanation:

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