Final answer:
If there are 30 commercials in 2 hours, then in 3 hours there would be 45 commercials, calculated by finding the commercials per hour and multiplying by the number of hours.
Step-by-step explanation:
The question asks how many commercials would be shown in 3 hours of TV time if there are 30 commercials in 2 hours. To solve this, we can set up a ratio since the number of commercials is directly proportional to the amount of TV time. If 30 commercials are in 2 hours, we divide 30 by 2 to find out how many commercials are aired per hour, which is 15 commercials per hour.
Next, to find out how many commercials would be aired in 3 hours, we multiply the number of commercials per hour (15) by 3 hours, which gives us ((15 commercials/hour) * 3 hours) = 45 commercials.
Therefore, the correct answer for the number of commercials in 3 hours of TV is 45 commercials, which corresponds to option a) 45.