Answer:
18- 8.00
19-22.74
20-4.47
Step-by-step explanation:
18- 3.79×2= 7.58
7.58 rounded is 8.00
19- 3.79×6= 22.74 not rounded
20- 0.946×4.73= 4.47458
4.47458 simplified is 4.47
