Answer:To find the wages of 15 laborers for 4 days based on the given information that the wages of 9 laborers for 5 days are $6300, we can set up a proportion to solve for the required amount.
Let's denote the wages of 15 laborers for 4 days as x.
Wages of 9 laborers for 5 days = $6300
We need to find the wages of 15 laborers for 4 days.
5d/4d=6300/x
9*5*x=15*4*6300
45x=60*6300
45x=378,000
x=378,000/45
x=8400
a = $8400
Step-by-step explanation: