Answer:
12
Step-by-step explanation:
The numbers of choices for each of B, C, D are independent of the choices the predecessors have made. It is clear where the car's owners will sit, so all we have to care about is where we put the other people. There are 16−4=12 places left in the cars, so there are 12!
Answer:
B) Interquartile range
Step-by-step explanation:
Since there are some students that do not eat fast food at all, their amounts spent monthly would be $0. These are much different than the rest of the data, and thus are outliers.
Outliers can greatly affect the mean. This tells us the mean may not be the best measure.
Since the mean is affected by outliers, the standard deviation is not the best measure either.
Adding data points of 0 will also affect the range. This leaves the interquartile range as the better measure.
A unit rate is something per one.
That means that we also need to include units so that we could know what we are talking about.
Basically divide, since this one is simple.
15/2 = 7.5
7.5 degrees per hour is our unit rate
This is a geometric sequence since there is a common ratio between each term. In this case, multiplying the previous term in the sequence by 4 gives the next term. In other words:
an = a1 * r ^ (n-1)
Now, knowing that a1 = 2, and r = 4
We check
a2 = 2 * 4 ^ (2-1) = 2 * (4 ^ 1) = 8
a3 = 2 * 4 ^ (3-1) = 2 * (4 ^ 2) = 32
a4 = 2 * 4 ^ (4-1) = 2 * (4 ^ 3) = 128
Therefore, this is the geometric function that this sequence fulfills.