From a mixture of vinegar and water which is 20% vinegar, 2 quarts are removed and replaced by pure vinegar. The results mixture is 49% vinegar. Find the number of quarts in the original mixture.

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

Determine the volume of a cylinder bucket if the diameter is 8.5 in. and the height is 11.5 in.

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?