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”
<span>The first task should be done while securing the vehicle is stopping in a legal, secure, parking space.So that we can avoid conflicts in parking the vehicles.Parking in a legal space will be the extra security for our vehicle.There is no any traffic collisions while taking or parking the car.Then police won't charge any fine for our vehicle if we park in legal space.</span>
Astrocytes play a critical role in normal function of the mammalian nervous system. Astrocytes regulate synaptic transmission and plasticity, protect neurons against toxic compounds, and support metabolically to ensure their optimal functioning.
I think the best thing to do is if theres an emergency brake use it or run into a tree but that is ur unsafe answer
