Use photomath trust meeee
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
30%
1/5 is 0.2, or 20%. So 50%+20% = 70%. The remainder is 30%
I believe it's c. babysitting
Frankfurters hourly wage: $5.67
Hair Stylist hourly wage: 80/15= $5.33
Babysitting hourly wage: 250/4=62.50/10= $6.25
