1 point) Use the Laplace transform to solve the following initial value problem: y′′+9y=cos(7t)y(0)=0,y′(0)=0 First, using Y for the Laplace transform of y(t), i. e., Y=L{y(t)}, find the equation you get by taking the Laplace transform of the differential equation and solving for Y:

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?

Aefg - almn. find the ratio of aefg to almn. a)1: 4 b)1: 2 c)2.1 d)4: 1

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost