50% does not go into 20% why does every body say it does?

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is

What is the area of the parallelogram? 48 sqrt(3)cm2 48 cm2 24 sqrt (3) cm2 24 cm2

Huong is organizing paperback and hardback books for her club's used book sale. the number of paperbacks is 12 less than three times the number of hardbacks. huong had 162 paperbacks. how many hardback books were there?