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ValentinkaMS [17]
2 years ago
15

A 4 foot man cast a 6 foot shadow how tall is a tree that cast a 21 foot shadow

Mathematics
2 answers:
nika2105 [10]2 years ago
7 0

Answer:

19

Step-by-step explanation:

4 and 6 has a two- foot difference so if the tree is 21 you do 21-2=19

Eva8 [605]2 years ago
3 0

Answer:

Step-by-step explanation:

Maybe 8 feet

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Answer:

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2 years ago
According to the American Lung Association, 7% of the population has lung disease. Of those having lung disease, 90% are smokers
postnew [5]

Answer:

Probability that a smoker has lung disease = 0.2132

Step-by-step explanation:

Let L = event that % of population having lung disease, P(L) = 0.07

So,% of population not having lung disease, P(L') = 1 - P(L) = 1 - 0.07 = 0.93

S = event that person is smoker

% of population that are smokers given they are having lung disease, P(S/L) = 0.90

% of population that are smokers given they are not having lung disease, P(S/L') = 0.25

We know that, conditional probability formula is given by;

                        P(S/L) = \frac{P(S\bigcap L)}{P(L)}  

                        P(S\bigcap L) = P(S/L) * P(L)

                                      = 0.90 * 0.07 = 0.063

So,  P(S\bigcap L) = 0.063 .

Now, probability that a smoker has lung disease is given by = P(L/S)

      P(L/S) = \frac{P(S\bigcap L)}{P(S)}

P(S) = P(S/L) * P(L) + P(S/L') * P(L')

       = 0.90 * 0.07 + 0.25 * 0.93 = 0.2955

Therefore, P(L/S) = \frac{0.063}{0.2955} = 0.2132

Hence, probability that a smoker has lung disease is 0.2132 .

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3 years ago
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Answer:

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Step-by-step explanation:

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Answer:

she can buy 9 shirts

Step-by-step explanation:

80-35=45

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plz mark brainlyest

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neonofarm [45]

Answer:

im not 100 percent sure but i think he right

Step-by-step explanation:

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