C=2 pie r
81.3/2pie=r
R=12.94
D=2r
D= 25.88
Answer:
They did not leave the correct amount. They left around a 22% tip
Step-by-step explanation:
15% = 0.15
68.25(0.15)
10.24
22% = 0.22
68.25(0.22) = 15.02
6
Factors of 90 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
Factores of 42 are: 1, 2, 3, 6, 7, 14, 21, 42
6 is the greatest common factor.