Can you guys help me answer these questions?

1 and 2 have already been done.

See below for the answers  to 4 to 6.

Step-by-step explanation:

7.  Finding the limit as x --> 2 of the function:

(2^(x + 2) - 16) / (4^x -16)

= 4(2^x - 4) / (2^x -4)(2^x + 4)

=  4 / (2^x + 4)

When x = 2 this = 4/8 = 0.5

The limit is the same whether you approach 2 from below or above.

So k = 0.5.

step-by-step explanation:

see if this :

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation: