<u>biomass can be converted directly into liquid fuels, called "biofuels," to help meet transportation fuel needs. The two most common types of biofuels in use today are ethanol and biodiesel, both of which represent the first generation of biofuel technology.</u>
Answer:
C
Step-by-step explanation:
Circumference of a circle=2πr
Where r is radius
C=(2*2.2)π
C=4.4π