Answer:
x= 47
Step-by-step explanation:
sum of angles in a triangle are 180
so 180 = x + 85 + 48
=> 180 - 85 - 48 = x
=> x= 47
or x= 180- (85+48)
=> x= 180 - 133
x = 47
67 degrees bc a straight line is 180 degrees
So 180-90=90
90-23=67
Answer: D). This was a cross-sectional cohort study
Step-by-step explanation:
The given situation is an example of cross sectional cohort study because the investigator choose the samples from the population using cross sectional method and use the same sample source for analyzing the independent variables for specific period of time or intervals of time to assess the history of exposures and outcomes.
Here, the lung function is tested at an interval of 7 years compared with the levels of exposure to the coal ash so it is the example of cross sectional cohort study.
Answer:
Step-by-step explanation: not sure what the answer is
Not answere just need point srry