You would have paid only .175. Of course in this particular case it does not make much of a difference if the call is longer than one minute and twelve seconds. Since many people use dial-around for short faxes, it pays to keep track of this, especially when sending many, many faxes, as those increments can add up quickly. Most companies charge in 60 second increments. You can use dial-around from most phones.
Some exceptions are mobile phones, payphones and some phones that restrict the use of dial-around.
Also, not every company has service in every part of the country. You can call to any destination around the world. Sometimes, however, your call will not go through. This can be due to many reasons. For one, the circuits can be busy.