Find the surface area of the composite figure​

276 cm^2

Step-by-step explanation:

Separate figure into triangular and rectangular prisms.

SA of triangular prism (finding each area of a face and add them all up)

4 x 5 = 20 cm^2

13 x 4 = 52 cm^2

1/2 x 12 x 5 = 30 cm^2

1/2 x 12 x 5 = 30 cm^2

20 + 52 + 30 + 30 = 132 cm^2

SA of triangular prism is 132 cm^2

SA of rectangular prism (do the same thing):

12 x 4 = 48 cm^2

12 x 3 = 36 cm^2

12 x 3 = 36 cm^2

3 x 4 = 12 cm^2

3 x 4 = 12 cm^2

48 + 36 +36 + 12 + 12 = 144

Add the SA OF BOTH PRISMS:

144 + 132 = 276 cm^2

The height of the TV is 15 inches.

Step-by-step explanation:

if the TV's diagonal is 17 and the width is 8 inches (crazy size for a TV), then we are looking at solving for the height using Pythagorean's Theorem because this is a right triangle situation.

17^2-8^2=a^2  and  289-64=a^2 .  a^2=225  so a = 15.