Research was done to study the facial expressions of people, since facial expression clearly shows the emotional state of a person. researchers found that people who smiled a lot lived longer than those who didn't smile much.

which statement can be inferred from the passage?

smiling prolongs human life.

smiling is associated with human longevity.

smiling decreases a person's life span.

there is no link between smiling and human longevity.

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?

Do social recommendations increase ad effectiveness? a study of online video viewers compared viewers who arrived at an advertising video for a particular brand by following a social media recommendation link to viewers who arrived at the same video by web browsing. data were collected on whether the viewer could correctly recall the brand being advertised after seeing the video. the results are given below.correctly recalled the brandarrival 409153browsing20484b. conduct the hypothesis test, using the 0.025 level of significance.what is the value of the test statistic? χ2stat=what is the p-value? p-value=is this value significant atα=0.025?

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.