Outside a home, there is a 10- key pad with letters a, b, c,d, e,f, g,h, i and j that can be used to open a garage door if the correct ten letter code s entered each key can only be used once. how many codes are there?

There are 3,628,800 possible codes.

Step-by-step explanation:

Observe that:

Following this argument we can see that the number of possible choices for the 4th,5th,6th,7th,8th,9th and 10th letter are 7,6,5,4,3,2 and 1 respectively.

Finally, since the letters choice are independent, we have that the number of possible codes is given by

answer: answer

step-by-step explanation:

step-by-step explanation:

divide, then simplify your answer.

1. make -15.66 ÷   5.8 a fraction. then divide.

2. simplify.  

3. final answer.