Answer:
Step-by-step explanation:
He used an incorrect time ratio converting hours to minutes.
Answer:
See below
Step-by-step explanation:
<u>If you just want the tip</u>
<u />![0.20*161.86\approx\frac{1}{5}*160=32](https://tex.z-dn.net/?f=0.20%2A161.86%5Capprox%5Cfrac%7B1%7D%7B5%7D%2A160%3D32)
<u>If you want the total bill</u>
<u />![1.20*161.86\approx160+32=192](https://tex.z-dn.net/?f=1.20%2A161.86%5Capprox160%2B32%3D192)
Pi radians is 180 degrees.
A
1) 180/3=60
2) 270
3) 45
4) 3240
B
1) 100/180=5/9
3) 30/180=3/18
5) 1/180
C
1) (pi) cm
2) 2pi