Answer:
Julie will reach her goal 21 days before Mary.
Step-by-step explanation:
Mary and Julie both have a goal of raising $1000 for charity.
Mary raises money in every 4 days = $12.
In one day Mary raises money = [tex]\frac{12}{4}[/tex]
= $3
Mary needs time to reach her goal = [tex]\frac{1000}{3}[/tex]
= 333.33 ≈ 334 days
Julie raises money in every 6 days = $19
In one day Julie raises money = [tex]\frac{19}{6}[/tex]
= $3.1666 ≈ $3.2
Julie needs time to reach her goal = [tex]\frac{1000}{3.2}[/tex]
= 312.5 ≈ 313 days
Difference of the days between both of them to reach their goal
= 334 - 313 = 21 days
Julie will reach her goal first, 21 days before Mary.
