Use a calculator to find the cross products. Compare the cross products and determine if the ratios form a proportion. Write “Y” if the ratios do form a proportion, and write “N” if the ratios do not form a proportion. 1. 3/12 and 10/30

2. 7/16 and 42/66

3. 13/70 and 39/200

4. 16/34 and 80/170

5. 11/12 and 66/72

6. 14/17 and 112/134

7. 2/3 and 120/190

8. 23/99 and 115/495

For each proportion find the unknown number x 1/5/8=×/15

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

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?