Total Area vs. Integral

What is the total area beween the curve and the x-axis on the interval $\left[a,d\right]$ ?

What is the value of  $\int_a^df\left(x\right)dx$  ?

The total area between the x-axis and the graph of $f\left(x\right)=x-3$  on the interval [0,6] is __________ 0.

Which has the largest value?

Which has the smallest value?

What is the total area between the x-axis and the graph of  $f\left(x\right)=6-2x$  on  $\left[0,4\right]$ ?

(a)  

If  $\int_0^8g\left(x\right)dx=20$  and  $\int_8^{12}g\left(x\right)dx=-5$ then  $\int_0^{12}g\left(x\right)dx=$  

If  $\int_0^8g\left(x\right)dx=20$  and  $\int_8^{12}g\left(x\right)dx=-5$ then the total area between the x-axis and the graph of  $g\left(x\right)$  on the interval  $\left[0,12\right]$  is:

If the graph of the function $y=f\left(x\right)$ is entirely above the x-axis on the interval  $\left[a,b\right]$ , what must be true? (Check all that apply)

The total area between the x-axis and the graph of $f\left(x\right)=x^2-4$  on the interval $\left[0,4\right]$  is: