Answer:
The best estimate of the number of times out of 39 that Ariana is on time to class is 27.
Step-by-step explanation:
For each class, there are only two possible outcomes. Either Ariana is on time, or she is not. The probability of Ariana being on time for a class is independent of other classes. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:

The probability that Ariana is on time for a given class is 69 percent.
This means that 
If there are 39 classes during the semester, what is the best estimate of the number of times out of 39 that Ariana is on time to class
This is E(X) when n = 39. So

Rounding
The best estimate of the number of times out of 39 that Ariana is on time to class is 27.
3 x 3 = 9 i hope that helps
A. because the lease amount of negative is actually more. if that makes any sense
Since they gave you the boxes you need the first number to be zero therefore having the quotient starting with zero. Then you may divide normally
X = 8
18-(2x8) = 18 - 16 = 2
8+9=17
Perimeter = 2x width + 2x length
Length = 2x2 = 4
Width = 2x17 =34 34 + 4 = 38