explanation:
In an observational study, we measure or survey members of a sample without trying to affect them. In a controlled experiment, we assign people or things to groups and apply some treatment to one of the groups, while the other group does not receive the treatment
Answer:
B I believe
Step-by-step explanation:
55
The whole 12 weeks she will make $2,172.
Her employer takes $421.2 for federal income tax. Her employer takes $174.1 for Social Security. Her employer takes $40.7 for Medicare. She makes $181 a week.
