Question

Julie wants to add call waiting and caller ID to her present phone service. Each new service is $5.99 per month. If her current bill is $29.50, how much will her total bill be if she adds the two features?​

Answer 1

$41.48

Explanation:

each additional bill is $5.99

that is $5.99×2+$29.50

her old billing plus the two extra services.

Not totally sure though

Answer 2

I am not sure, if the number displayed is a valid call ID
number, but Caller ID displays the phone number of the person who
made the call to you including the area code and phone number. From
this you an identify the person calling you. If you have a phone
book system in the phone and you have saved phone numbers with
names, some phones will display name of the person from the address
book when the caller id matches the stored number.
Some times the number displayed on caller ID is not a standard
phone number. Some of these calls may be from a VOIP service or
from some customer service call centers (internal on the service
provider network) or when the caller ID is masked by the caller or
caller's network service provider.

Neeraj Sharma