18.50/100 = 0.1850
0.1850 x 20 = 3.70
18.50 - 3.70 = 14.80
14.80/100 = 0.1480
0.1480 x 6 = 0.888
14.80 + 0.88 = 15.68
the final cost would be $15.68
Answer:
number one 50 I think and 3 is 75 not positive but I hope it helps
Step-by-step explanation:
It would be 90%..... 45/450= 10%.... so there would be 90% not being used.
