25+N=61.
N= 36
So there is 36 numbers in Abby's cell phone.
Answer:
Exponential
Step-by-step explanation:
Answer:

Step-by-step explanation:
From the question, we have the following condition:

We know that each student who hears the rumor tells it to a student picked at random from the dormitory (excluding, of course, himself/herself and the person from whom he/she heard the rumor)
The 3rd student can therefore tell the rumour to n-2 students but only n-3 will accept it.

Consequently, the 4th student must not tell the 1st and second students.

We can rewrite this to observe a pattern:



Hence, the probability that the rumor is told r times without coming back to a student who has already is:

See attachment for complete question
Step-by-step explanation:
3km 650m = 3650m
3650 × 10 = 36500m = 36km 500m