The cost of 2 liters of lube oil is $7. What is the cost of 5 liters of lube oil?	Select.
A) 17.5
B) 20.5
C) 24.0
D) 28.5
E) 30.0
The cost of one liter of oil=7/2= 
<gadget id="calculator">7/2</gadget>
<output>7/2 = around 3.5</output>
3.5   The cost of five liters of oil= 3.5x5= $ 17.5   17.5nswer: 17.5
<result>A</result>
The cost of 2 liters of lube oil is $7. What is the cost of 5 liters of lube oil?