Answer:
19.9 miles
Step-by-step explanation:
In this problem we have:
is the distance travelled during the 1st day
is the distance travelled during the 2nd day
is the distance travelled during the 3rd day
is the distance travelled during the 4th day
We notice that the difference between the distance travelled on the (n+1)-th day and the distance travelled on the n-th day doubles every day. In fact:
Which can be rewritten using the general formula:
This means that
By applying this formula recursively, we can find the 7th term, which is the distance travelled on the 7th day:
So, the distance travelled on the 7th day is 19.9 miles.
Answer:
The second choice
Step-by-step explanation:
In most cases, the dependent variable is the y value in the graph.
The dependent variable is the thing that is being measured or changing.
In this example it can't be the time because time is always moving at a constant rate and there is nothing that can be done to change it.
