4) A company that makes car parts uses two models to estimate the company's profit (in dollars). The first model is P(x) = 90x – 4x², where x is the number of parts produced, and the second model is P(x) = 25x + 170. There are two solutions to the system of equations using both models. Of those two solutions, what is the number of parts that gives the largest profit, and what is that profit? Round the number of parts to the nearest whole number and the profit to the nearest cent.​

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?