10 !
rebecca brought a jewelry box in the shape of an octagon. she wants to put a net over the lateral faces of the box. find the lateral area of the jewelry box. (justify)

show your work. no plagiarism

* Rebecca's jewelry box has 8 lateral faces (it is an octagon), and 2 bases (a top and a bottom).

Assuming that the shape of the box is a regular octagon, there are eight

5"x2" rectangles (the sides) that will be covered.  That is, 8 * 5" * 2" = 80 square inches.

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.