Solve the problem.How many liters of pure baking soda must be added to 200 liters of a 30% baking soda solution to get a 60% baking soda solution?

A. 150 liters
B. 200 liters
C. 100 liters
D. 250 liters

Answer: A

Mathematics

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Part of $3,800 is invested at 12%, another part at 13%, and the remainder at 14%. The total yearly income from the three investments is $506. The sum of the amounts invested at 12% and 13% equals the amount invested at 14%. Determine how much is invested at each rate.

A. $1,100 at 12%, $800 at 13%, $1,900 at 14% B. $700 at 12%, $1,200 at 13%, $1,900 at 14% C. $700 at 12%, $1,900 at 13%, $1,200 at 14% D. $600 at 12%, $1,300 at 13%, $1,900 at 14% E. $800 at 12%, $1,300 at 13%, $1,700 at 14%

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Mathematics