The two primary functions of the skull are to protect the brain and to
-form the structure of the face and head.
-serve as the hub of the nervous system.
-link the brain and the rest of the nervous system.
-protect the other parts of the nervous system.

I would say A. I might be wrong, but I hope this helps a bit~

Form structure of face and head

This is a pretty on point question because all we need to do is replace 's' in the equation with '35'.the calculation will be9.95 + 0.30s = c9.95 + 0.30 (35) = c9.95 + 10.5  = cc = 20.45

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases.