Acombination lock requires three numbers from 1 to 25. how many combinations are possible? did you use the sum rule or the product rule? (note that although we use the term combination with locks, order matters.)

Combinations possible = 25 * 25 * 25. Product rule

The point is that numbers can be reused. 1 5 1 is a valid combination as is   4 4 4 

20 * 5 * 1 is a valid combination as is 1 25 5

So the answer is 15625 "combinations" are possible <<<<< answer

is the irrational number between 7.7 and 7.9.

Step-by-step explanation:

We have been given two numbers 7.7 and 7.9

whenever we need to find irrational number between any two given numbers

First thing we do is square both the numbers

Here

That is

And

That is

Hence, we can take the number in between 59.3 and 62.4 is 61

since,

Hence, 7.745966..... is the irrational number between 7.7 and 7.9