If it takes the jones family 2 days to travel 1240 miles how many days will it take them to travel 2480

T would take 4 days because you're just doubling it.

For Part A, since we know that 850 teenagers were surveyed and 32% of them like hard rock, we can solve using the following method:
1) First, we can multiply 850 by 32% or 0.32. That gives us 272.
2) Now, we know that out of the 850 kids surveyed, only 272 like hard rock.

For Part B, since we know that 75% of the kids surveyed, which can also be known as 150 teenagers, we can solve using the following method:
1) First, we can divide 150 by 3, since we know that 75 is 3/4 of 100. That gives us 50.
2) Now we can add 50 to 150, which gives us a total of 200 students that were surveyed.

For Part C, an example in which a percentage greater than 100% could have to do with vitamin and nutrition intake, or change in world population. An example could be: the world population increased by 500% from 1804 to 1999.

I hope this helps you!