5:6
The fraction 85/102 goes to 5/6 so it is 5:6 or 5/6...
9 times 16 = 144
2(9+16)= 50
smallest possible perimeter is 50(whatever unit you're doing)
You need to put a picture of the graph in the question and I can answer it.
Assuming that by "16t2" you mean
:
First of all, let's compute the position at the two required times:


So, the ball traveled a total distance of
, during the time
.
The average rate of change is the ratio between these two:

To solve this problem, we need to know the formula for the nth term of an arithmetic sequence. The formula is

= t₁ + (n-1)d, with

being the nth term, t₁ being the first term, and d being the distance between terms. Now we can substitute values to figure out what

is. When substituting, the equation becomes:

= 12 + 29(-6)

= -162
That means that the 30th term in this arithmetic sequence is
-162.