The answer is b. Notice that the problem is looking for the reaction to product ratio, which is tricky because it's easy to follow the order of the column and calculate the inverse of it. Check the first ratio, 0.3/2=0.15, we can immediately choose b out of the other 4 choices.
Answer:

Step-by-step explanation:
we know that
To find out how many weeks it will take to repair this stretch of road, divide the total length of the road by the workers' rate
so

Convert mixed number to an improper fraction


substitute

Convert to mixed number

Answer:
558
Step-by-step explanation:
First you multiply 20 by 28, you'll get 560. then you subtract two and you'll end up with 558