Question

The weekday rate for a telephone call is a 2.00 flat fee and a 0.25 for each minute .due to a discount the cost of all calls made during weekend is 30% less of the cost on a weekday. How much cheaper is it to make a 10 minute call on a Sunday than on a Monday

Answer 1

Monday : 2 + 10*0,25 = 2+2,5 = 4,5

Sunday : Monday - 0,3*Monday = 4,5 - 0,3*4,5 = 4,5 - 1,35 = 3,15

It's cheaper for 4.5 - 3.15 = 1,35