Find the total surface area.
A. 422 in²
B. 554 in²
C. 638 in²
D. 517 in²

c

Step-by-step explanation:

you have to find the surface area of all sides. so (11*11)*2 and (11*9) *4 with this you get c. 638in square.

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116

what chart am i supposed to follow?