Answer the following questions. 1) Solve the percent change problem using the proportion formula. List the information
given by each situation. Show the substitution into the proportional formula equation.
State the final result in a complete sentence using the appropriate unit.
A city has a sales tax rate of 9%. If Dion paid $6.30 in sales tax on a new guitar pedal, how much
was the purchase price of the pedal?
Increase or decrease:
O Increase
O decrease

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?