Please help I'll give brainliest Find the surface area of a number cube if the height is 3cm.

​

54 cm²

Step-by-step explanation:

To find the area we have to:

1) Multiply 3 x 3= 9 (we do this because a cube has equal sides so if the height is 3 then the base will be 3).

2) Then take 9 and multiply it by the number of sides of a cube (6 sides)

so, do 9 x 6 = 54cm²

Hope that helped! :)

162 cm^3

Step-by-step explanation:

here's your solution

==> surface area of cube = 6a^3

==> a = 3 cm

==> surface area = 6*3^3

==> surface area = 6*27

==> surface area of cube = 162 cm^3

hope it helps

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere

idk

step-by-step explanation: