pls help asap 20 points How many phone numbers are possible in the (770) area code if: For the form ABC-, A is restricted to numbers 2-9. B, C, and X can be any digit 0-9. Also, the ABC of the phone number cannot be 911. a) 8,000,000 b) 7,990,000 c) 7,000,000 d) 7,999,999