Answer:
PR = 11
Step-by-step explanation:
PR = PQ + QR = 8 + 3 = 11
70 percent
5 gallons x gallons
------------- = ----------------
12 hours 240 hours
using cross products
5 * 240 = 12 * x
1200 = 12 x
divide each side by 12
1200/12 = 12x/12
100 =x
You will need 100 gallons
