How many different 7 digit phone numbers are possible if number can be repeated, but the last number must be 0 ?

Since the last digit is already decided, you only have to find the possible ways for a 6 digit phone number. For each individual digit, you have a possibility of 10. Since there are 10 numbers, the answer is

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100