Answer:
Radius of large cylinder 
Step-by-step explanation:
Volume of the larger tank is three times the volume of smaller tank
Volume of smaller tank

Volume of larger tank

Or it can also be written as

The answer that you have is most likely right, since the grouping did not change.
Answer:the price of jeans now is $12
Step-by-step explanation:
Let x represent the current price of the jeans. At the local department store, jeans are typically priced at $15. It means that the original price of the jeans is $15 .
Due to a special, the jeans are reduced to 80% of their original price. This means that the original price was reduced by 20%. Therefore, the current price, x would be
x = 15 - (20/100 × 15) = 15 - 3
x = $12