I need help with numbers 8 and 9...
2 answers:
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Answer:
Sample relative risk is 10.
Step-by-step explanation:
We are given the following in the question:
Group 1 of coal miners: 30 out of 150 get lung cancer.
Group 2 of non-coal miners: 5 out of 250 get lung cancer
Sample relative risk:
- It is the ratio of probability of an outcome in an exposed group to the probability of an outcome in an unexposed group.
Sample relative risk =
Thus, sample relative risk is 10.
Answer:
Step-by-step explanation:
Width =x
Length = 2*x = 2x
Diagonal = 5√5
Use Pythagorean theorem
Length² + Width² = diagonal²
(2x)² + x² = (5√5)²
{}
4x² + x² = 75
5x² = 75
x² = 75/5
x² = 15
x = √15
Width = √15
Length = 2√15
Area of rectangle = length *width
= √15 *2√15
= 30 square units