Five percent of a certain grass seed is timothy. If the amount of the mixture needed to plant one acre contains 2 pounds of timothy, how many acres can be planted with 640 pounds of the seed mixture?
Choose the correct choice from the following answers.
A) 12	B) 16	C) 20	D) 24	E) 120
If the mixture contains 2 pounds of timothy, the mixture must be 40 pounds.   Thus we need 40 pounds of mixture per acre.   640 / 40= 
<gadget id="calculator">640 / 40</gadget>
<output>16</output>
16 acres   The answer is 16.
<result>B</result>
Five percent of a certain grass seed is timothy. If the amount of the mixture needed to plant one acre contains 2 pounds of timothy, how many acres can be planted with 640 pounds of the seed mixture?