Answer:
It helps you know if the answer is reasonable because when you do the work and get your answer, you can check if it is close to your estimate, and if it is, it is most likely correct. On the other hand if it is not close to the estimate it is most likely wrong, unless you estimated incorrectly.
Step-by-step explanation:
It takes 48 hours if 12 people built the same wall.
Please see the attached picture for full solution
Hope it helps
Good luck on your assignment
Answer:
The answer is fifteen because 24 divided by 8 is 3 and 5 x 3 is 15
You mean 60%of 5 1/2? that makes more sense...
i would do it like this:

(60% is the same as

(so that there is no confusion, i've put it into an improper fraction
now we can multiply:





which is 3.3.
so 60% of 5 and a half is 3.3.
It is the second option or b