Users make payments electronically than in person. Electronic payments have been made to provide a secure internet transaction. It is usually in 4 categories namely credit card,debit card, micropayment system and electronic cash. The answer in the situation where Lina switch to new provider for the online payment system is due to self-service.
-√20 * 15 = 
which is not rational. Square root of 20 is irrational, so a coefficient of -15 wont make it rational
That depends on the person you are. Whether you're friendly, vicious, or shy.
