Well if you split 1/4 in half then that will give 1/8. You must also split 0.25 in half which gives 0.125

Now you can multiply that by 5 which gives 5/8. But also the fraction

Now we know that 5/8 = 0.625
11.
Given:

Differentiate with respect to x, we get

The given point is (3,9)
Substitute x=3 in the derivative, we get

Hence the slope is 3.
12.
Given:

Differentiate with respect to x, we get

The given point is (0,4)
Substitute x=0 in the derivative, we get

Hence the slope is 0.
I'm pretty sure its the second one