Pablo and johanna have to do a yearlong study for their biology course. after some discussion, they decide to try comparing their dogs and the diet that they feed them to test their hypothesis that the local veterinarian's special dog food mix will enhance growth and development. each student adopts a puppy from the local pound. pablo plans to feed his shepherd-mix dog the special diet, while johanna plans to use generic dry kibble from the supermarket for her bulldog. the independent variable in this study will be

The type of food they are feeding the dog.

Step-by-step explanation:

The independent variable is the test variable of the experiment. Therefore, you can see that Pablo and Johanna both use different types of food to feed their dogs, to see which one grows faster. The growing faster is the dependent variable because how fast the dogs grow is what is being measured.

the answer is 489

step-by-step explanation:

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads