how many square feet of cardboard does jessica have to make a rectangular prism if she has a length of 16 inches a width of 9 inches and a height of 4 inches??

Guest Mar 31, 2017

#2**+1 **

I assume you have a prism with a length of 16 inches, a width of 9 inches and a height of 4 inches and you want to know the surface area

1st...convert these to feet

16 in = 1 + 1/3 ft = 4/3 ft

9 in = 3/4 ft

4 in = 1/3 ft

And the surface area =

2 [ 4/3 * 3/4 + 4/3 * 1/3 + 3/4* 1/3 ] =

2 [ 1 + 4/9 + 1/4 ] =

2 [ ( 36 + 16 + 9 ) / 36 ] =

(1/18) ( 61) =

(61 / 18) sq ft ≈ 3.38 sq ft.

CPhill
Mar 31, 2017