Abel bought a mini hi-fi set for S600. He sold it to Bob at a loss of 20%.
Bob sold it to Charles and made a profit of 5%. How much did Charles pay for it?

Step-by-step explanation:

Abel:

Cost price = $ 600

Loss = 20%

Selling price =

                     = 80 * 6 = $ 480

Cost price for Bob = Selling price of Abel = $ 480

Bob's cost Price = $480

Selling price =

                      = $ 504

Amount paid by Charles =$ 504

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: