Answer:
16%
Step-by-step explanation:
add all of them together (total=18) and divide 3 by the total
You will get 0.16 and you turn it into a percentage by moving the decimal two places to the right
It is 8.7cm just trust me bro I got it right
Answer: Relative risk of anxiety associated with coffee use is 5 times the anxiety associated with non coffee use.
Step-by-step explanation:
Since we have given that
Number of coffee drinkers = 10000
Number of whom developed anxiety = 500
Number of non coffee drinkers = 20000
Number of whom developed anxiety = 200
So, probability of getting anxiety from coffee drinkers = 
Probability of getting anxiety from non coffee drinkers = 
so, Relative risk of anxiety associated with coffee use is given by

Hence, Relative risk of anxiety associated with coffee use is 5 times the anxiety associated with non coffee use.