Evaluate the function at the given value
f(n)= 3n^3 + 8n^2 + 7n + 1 at n= -2

Step-by-step explanation:

The image of the room is in the attachment.

(c) 12.8 m²

Step-by-step explanation:

The area of a trapeze is calculated as:

A =

where:

B is bigger side

b is smaller side

h is height of trapeze

From the image, we have:

B = 3.8m

b = 2.6m

h = 4m

A =

A = (3.8+2.6).2

A = 12.8

The area of the trapeze is A = 12.8 m².