Which of the following is false concerning biofuels? the plants used to manufacture biodiesel are large and expensive. it is a simple process. the raw materials for biodiesel are cheap and easy to obtain. cars that run on diesel can also run on biodiesel.

It is FALSE to indicate that processing of biofuels is a simple process. Currently, the methods of processing biofuels are difficult and expensive and more research is being sought into effective processes, if biofuels are to remain a viable source of fuel that would supplant fossil fuels.  

$21

Step-by-step explanation:

$4.50x3=$13.5

$1.25x6=$7.5

$13.5+$7.5=$21