Position A:_Food enters the mouth. It is broken down by chewing and grinding. Saliva is also secreted from under the tongue to help
break down the food with enzymes.
1. Is this a mechanical digestion? Chemical digestion? Both?

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

c. electrical charges of ionic bonds.

explanation:

0.07 g/cm³

1.37 g/cm³