Answer:
1) See figure attached
2)
a) 
And if we replace we got:

b) 
And if we replace we got:

Step-by-step explanation:
Part 1
We can see the plot in the figure attached.
Part 2
a)
For this case we have two points 
And we want to find the distance travelled between these two points and we can use the following formula from the euclidian distance between two points:

And if we replace we got:

b)
Since it takes two seconds in order to go from (6.9) to (10,15) we can use the definition of velocity:

And if we replace we got:

Answer: (0;16) (4;0) (2;0) (-2;0).
Step-by-step explanation:
Y-intercepts of the graph of the function F(x)=x³-4x² - 4x + 16:

X-intercepts of the graph of the function F(x)=x³-4x² - 4x + 16:

D) as age increases, weight increases by 5
2. Definition of midpoint
3. Given
4. Transitive property
Tan (45)=x/100
Put tan(45) over 1 and cross multiply to get an equation
Tan (45)•100=1x
Solve for x
Tan (45)•100=161.977