LucyNeedsMathHelp
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25+ Points for BEST TWO answers!

1. What is the surface area of the right trapezoidal prism?

[SEE ATTACHMENT]

A. 130 cm²

B. 114.5 cm²

C. 48.5 cm²

D. 98.5 cm²


2. The four walls of a room are going to be wallpapered. The room is shaped like a rectangular prism, and its length, width, and height are 20 ft, 18 ft, and 9 ft, respectively.

How much wallpaper is needed to complete the job?
[SEE SECOND ATTACHMENT]

A. 684 ft²

B. 342 ft²

C. 1080 ft²

D. 796 ft²

25 Points for BEST TWO answers 1 What is the surface area of the right trapezoidal prism SEE ATTACHMENT A 130 cm B 1145 cm C 485 cm D 985 cm 2 The four walls of class=
25 Points for BEST TWO answers 1 What is the surface area of the right trapezoidal prism SEE ATTACHMENT A 130 cm B 1145 cm C 485 cm D 985 cm 2 The four walls of class=

Respuesta :

 You are not supposed to be wallpapering the ceiling or the floor. Because of that the formula to answering this question is:  2(h*w) + 2(l*w) [to account for the 4 walls being wallpapered] 
2(9 x 18) + 2(9 x 20) 
2(162) + 2(180) 
324 + 360 
684 is the answer