Answer:
63
Step-by-step explanation:
Answer:
1+1-1*1/1=1
Step-by-step explanation:
1+1-1*1/1=1
Answer: B. Controlled experiment
Step-by-step explanation:
This is a controlled experiment because the variables in the question are manipulated by the researcher. We are told that while one group watches television before going to sleep, the other group does not.
The controllers won't have control over the variables that were used if it was an observational study while for a survey, it has to do with collection of information regarding certain topics or happenings in order to have people's perception on the topic or area of interest.
36 is 75% of 48 , so there was 48 questions .
Subtract 25 from 85 and that is your x
