Answer:
Part 1 - Local Package Store 0.75 × 10 = $7.50 + $3.30 = $10.80
Nationally-Owned Package Store 0.95 × 10 = $9.50 + $3.30 = $12.80
Part 2 - Local Package Store #1 0.75 × 15 = $11.25 + $3.30 = $14.55
Nationally-Owned Package Store #2 0.95 × 15 = $14.25 + $3.30 = $17.55
Part 3 - Local Package Store #1 0.75×17 = $12.75 + $3.30 = $16.05
Nationally-Owned Package Store #2 0.95×17 = $16.15 + $3.30 = $19.45
Part 4 - 1. The Local Package Store was Cheaper for all three packages than the Nationally-Owned Package Store.
2. The Local Package Store is cheaper for the 1 pound 1 ounce package than the Nationally-Owned Package Store.
If you divide the ratio: 2 min= 6 gallons in half you get: 1 min = 3 gallons
Since we now know that the the aquarium drains at 3 gallons per minute. You can just multiply your X by 5.
y = Gallons
x = Minutes
5y = 15x
Look at the attachment for work
The answer is
c - 5 : 1
5m = 500 cm