What is the surface area of the cube?

64 mm²
192 mm²
384 mm²
512 mm²

cube with length, width, and height labeled 8 millimeters

C) 384 mm²

Step-by-step explanation:

A cube has 6 faces, all squares

Area of each face: s²

8² = 64

Surface area

6 × 64

384 mm²

All the side lengths of a cube are the same.

A cubes as 6 sides (faces).

Find the area of one side.

8 * 8 = 64 mm²

Multiply by the number of sides.

64 * 6 = 384 mm²

Therefore, the surface area of the cube is 384 mm²

Best of Luck!

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places