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mote1985 [20]
3 years ago
10

PLZ HELP ME WITH THIS QUESTION!

Mathematics
1 answer:
Paul [167]3 years ago
5 0

Answer:

56

Step-by-step explanation:

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A health study tracked a group of person for five years. At the beginning of the study, 20% were classified as heavy smokers, 30
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Answer: 0.421

Step-by-step explanation:

Heavy smoker = 20%

Light smoker = 30%

Non smokers = 50%

We can assume that the probability that a non-smoker is going to die in the next 5 years be y.

Since light smokers were twice as likely as nonsmokers to die during the five-year study, the probability will be:

= 2 × y = 2y

Probability for the Heavy smokers will be:= 2 × 2y = 4y

The expected number of people that will die for each in the next 5 years will be:

Non smoker:

= 50% × y

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Light smoker:

= 30% × 2y

= 0.3 × 2y.

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= 20% × 4y.

= 0.2 × 4y

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The probability that the participant was a heavy smoker will be:

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3 years ago
What is the inverse of the function f(x) = 2x + 1?
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Answer:

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Step-by-step explanation:

* Lets explain how to find the inverse of a function

- To find the inverse of a function :

# Write y = f(x)

# Switch the x and y

# Solve to find the new y

# The new y is f^{-1}

* Lets solve the problem

∵ f(x) = 2x + 1

- Put y = f(x)

∴ y = 2x + 1

- Switch x and y

∴ x = 2y + 1

- Solve to find the new y

∵ x = 2y + 1

- Subtract 1 from both sides

∴ x - 1 = 2y

- Divide both sides by 2

∴ (x - 1)/2 = y

- Divide each term in the left hand side by 2

∴ y = 1/2 x - 1/2

- Replace y by f^{-1}

∴ f^{-1}(x)=\frac{1}{2}x-\frac{1}{2}

* The inverse of the function is f^{-1}(x)=\frac{1}{2}x-\frac{1}{2}

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c

Step-by-step explanation:

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