2.75 * 12 = 33.
If the Sanchez family is using 2 3/4 (or 2.75) tubes of toothpaste and there are 12 months in a year, we use the equation above and get 33 as our answer.
Answer:
Step-by-step explanation:
1000 mm = 1 m
6000 mm = 6000/1000 = 6 m
R/9 = -21
Multiply by 9
r = -189