According to an almanac, 100% of adult smokers started smoking before turning 18 years old. (a) If 100 adult smokers are randomly selected, how many would we expect to have started smoking before turning 18 years old?
(b) Would it be unusual to observe 90 smokers who started smoking before turning 18 years old in a random sample of 100 adult smokers? Why?

1/5x+9 2/5y+7

step-by-step explanation:

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation:

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step-by-step explanation:

answer: the answer is b. i think hope i got it correct

step-by-step explanation: