Answer:
Dispersion
Step-by-step explanation:
Given a set of scores {a1, a2, ..., an} ordered in value, the range can be described as the difference between the highest and the lowest value. We can write it as:
range = an - a1
Thus, the range provides information about the dispersion of our set of values. A high range means that the highest and the lowest value are highly separated, on the other hand, a low range mean that there is a little difference between those values.
This is usually used to measure dispersion on a set of values, together with standard deviation and interquantile range. However, we cannot maintain that one is better than the others.
Let the smaller of the two numbers be x. Therefore the larger number is 1 bigger, x+1.

We can solve this equation for x, which will be one of our two numbers.



Now that we've found x, we can find x + 1. In this case,

.
Therefore, the two numbers are 29 and 30.
Y=mx
m=amount of time per day studied
y=time
x=number of days
we have
60=m(4)
divide by 4
15=m
y=15x
Your question answer is 16