Studying... Please help! Thank You!
The telephone Number of a district has this format: NYZ ABC-XXX,
where NYZ is area code.
a. How many all possible area codes are there if N is 6-9, Y is 3-
8 and Z is 0-9 in this district?
b. The 7-digit numbers in the district have the form ABC-XXXX,
where X, B, and C can be any digit 1–9 and A is restricted to
3–8. How many 7-digit numbers there?
c. How many possible telephone numbers in the district?

Question

Studying... Please help! Thank You!
The telephone Number of a district has this format: NYZ ABC-XXX,
where NYZ is area code.
a. How many all possible area codes are there if N is 6-9, Y is 3-
8 and Z is 0-9 in this district?
b. The 7-digit numbers in the district have the form ABC-XXXX,
where X, B, and C can be any digit 1–9 and A is restricted to
3–8. How many 7-digit numbers there?
c. How many possible telephone numbers in the district?

tgstudios · Answer

that's a lot of numbers... I cant process it sorry