Find the surface area of the regular hexagonal prism. Round your answer to the nearest hundredth. A. 528 55 mm
B. 628 55 mm
C. 720 55 mm
D. 860 55 mm

860.55 mm

Explanation:

The surface area of an hexagonal prism, also known as an octahedron, is given by the following formula (since we have the apothem):

S= 6*b*(a+h)

where b = is the side of the base, a is the apothem length, and h = the height

S = 6 * 8 * (4√3 + 11) = 48 * 17.92812 = 860.55 sq mm

Could have also have used another formula without the apothem:

S =3 * √3 * b² + 6 * b * h

S = 3 * √3 * 8² + 6 * 8 * 11 = 3√3 * 64 + 528 = 332.55  + 528 = 860.55 sq mm

answer:  

123455421

step-by-step explanation: easy

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3