Answer:
GCF is 4
Step-by-step explanation:
The factors of 20 are: 1, 2, 4, 5, 10, 20
The factors of 28 are: 1, 2, 4, 7, 14, 28
Then the greatest common factor is 4.
Answer: DA:FA=KE:EF, DF:DA=KF:KE and FA:DA=EF:KE are correct.
Explanation: Since, 
and 
are similar triangles.
Because, 
and 
(because EA and KD are parallels. And, 
is common angle for these triangles.
Therefore, according to the property of similar triangles.
FE:EK= FA:AD, FE:FK=FA:FD and DF:DA=KF:KE .
Thus, first, second and third options are correct.
Answer:
Survey data should not be treated as interval data because the measure distance between categories may not be perceived as the same.
Step-by-step explanation:
Maybe you can be right with the ranking, for example:
White = 1
Grey = 2
Black = 3
But most sure the grey will be closer to black than it is to white, or vice versa.
One tenth is 0.1. One hundredth is 0.01. Therefore, one ten thousandth is 0.00001. The answer is 111.11111.
