The answer is c because the numerical expression correction is 28
Explanation:(a) Was this an observational study or an experiment? Explain your reasoning. Experiment, because certain variables were controlled (he sets the screen brightness to low and then starts a movie) to determine if iPhones last longer if the screen brightness is set to low, and it proves the cause and effect relationship.
(b) What is the explanatory variable and the response variable? Response Variable- To determine if iPhones last longer if the screen brightness is set to low Explanatory variable- he sets the screen brightness of 10 of the iPhones to high and starts a movie, then the other 10 to low and starts a movie.
(c) Was a random sample used to collect the data? Yes- “he selects a random sample of 20 brand new iPhones”
Answer:
Withdrawal
Explanation:
Addiction does not make sense in any context.
Withdrawal is a word used for the stopping of a medication, addiction or prescribed.
Independence has no context here.
Relapse is not pertained to this subject either.
Answer:
Prokaryotic cells are used to perform specific functions such as respiration and digestion of waste.
Explanation:
I think it's D. Adalya and Declan
