Achild psychologist claims that video games increase the number of violent behaviors that children exhibit per week. to test the psychologist's claim, a school principal decided to conduct an experiment. the principal randomly selected 300 children and assigned 150 of the children to at least 30 minutes of video game play per day. the principal then assigned the remaining 150 children to no video game play.

after observing the children for one year, the principal reported that, on average, children who played at least 30 minutes of video games per day exhibited four more violent behaviors per week than children who did not play video games.

what can be concluded from the principal's report?
a.
it can be concluded that children who play at least 30 minutes of video games per day exhibit more violent behaviors per week than children who do not play video games.

b.
it can be concluded that video games have no impact on the number of violent behaviors exhibited by children per week.

c.
it can be concluded that children who do not play video games exhibit more violent behaviors per week than children who play at least 30 minutes of video games per day.

d.
there is not enough information to make any conclusions regarding the principal's report.

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

aloha~! my name is zalgo and i am here to you out on this amazing day. to answer your question, yes, nonzero numbers can have a greatest common factor and that would be 1. still don't get it? let me considering every number is divisible by 1 and hence every number has 1 as a factor of theirs. so, if 2 nonzero numbers didn't share any gcf (greatest common factor), they would still have a factor in common and that would be 1.

i hope that this ! : p

"stay and stay proud! " - zalgo

(by the way, do you mind marking me as brainliest? i'd greatly appreciate it! mahalo! x3)

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of