Answer:
<h3>The option D) All of the above is correct</h3><h3>The major disadvantage of crude rates is that:</h3>
- They may not allow for comparison of populations that differ
- They do not permit comparisons of populations that vary in age distribution.
- They are difficult to calculate from available data sources.
Hence options A ,B and C are correct
Step-by-step explanation:
Given that crude rate
To find the disadvantage of crude rate :
A crude rate is the number of new cases (or deaths) occurring in a specified
, it can be expressed as the number of cases per 100,000 population at risk.
<h3>The major disadvantage of crude rates is that:</h3>
- They may not allow for comparison of populations that differ
- They do not permit comparisons of populations that vary in age distribution.
- They are difficult to calculate from available data sources.
Hence options A ,B and C are correct
<h3>∴ The option D) All of the above is correct.</h3>
Answer:
parallelogram
Step-by-step explanation:
technically its a quadrilateral too but seeing as it has 2 sets of parallel lines Im going with parallelogram.
= 
Step 1: Cancel 4/6 and change to 2/3.

Step 2: Adjust Fractions based on the LCM.
The LCM of 3 , 9 : 9


Step 3: Subtract the numbers : - 6 -7 = -13

Answer:
Step-by-step explanation:
a)

b)
Rationnel roots are divisor of -2: -1,1,-2,2

c) see picture