Answer:
7040
Step-by-step explanation:
C= 2000
B = 20/100 x 2000 = 400 + 2000 = 2400
A= 10/100 x 2400 = 240+2400= 2640
2000 + 2400 + 2640 = 7040
called unit rate .
42
39+39 = 78
162 - 78 = 2 lengths =84
84/2 = 42
The bill is $12.65 without a tip.
sweet
This took 80 minutes