**Answer:**

D

**Step-by-step explanation:**

note that x = - 3 < - 2, thus

f(x) = , then

f(- 3) = = -

**Answer:**

200 ft²

**Step-by-step explanation:**

Each face is an isosceles right triangle with a hypotenuse of length 10 ft. The area of each of those triangles is

A = 1/4·h² . . . . where the h in this formula is the hypotenuse length

So, the area of the four faces (the lateral area of the pyramid is 4 times this, or ...

A = 4·1/4·(10 ft)² = 100 ft²

Of course, the base area is simply the area of the square base, the square of its side length:

A = (10 ft)² = 100 ft²

So, the total area is the sum of the lateral area and the base area:

**total area =** 100 ft² +100 ft² = **200 ft²**

_____

If you think about this for a little bit, you will realize the pyramid must have zero height. That is, the slant height of a face is exactly the same as the distance from the center of an edge to the center of the base. "Not drawn to scale" is a good description.

Answer:

Step-by-step explanation: has anyone found it?

-4K = 1.2 + 6

-4K = 7.2

-4K/-4 = 7.2/-4

Therefore k = -1.8