Answer:
places.
Step-by-step explanation:
There are seven zeros, so in powers of ten notation it is written as 

Step-by-step explanation:
see the pic for the answer
Phytagorean Theorem i think
Four times the sum of n plus six
Answer:
2000
Step-by-step explanation:
Hello,
A or C means 2 ways
and then a digit means 10 ways 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
so in total we have 2*10*10*10 = 2000 possible codes
Hope this helps