The volume of a sphere is given by the equation
, where r is the radius.
We are given the diameter of the sphere, but recall that the diameter is twice the radius:
. So the radius is half of the diameter:
.
Half of 8 cm is 4 cm.
We substitute this for r in the equation and we use 3.14 for <span>π.</span>
Answer:
You cannot add like terms like that.
Step-by-step explanation:
The terms are supposed to be added together, by combining them like that you are multiplying them together.
(2y - x )² = (x-2y)²
So x(2y - x )² + 2x²(x - 2y)
= x(x-2y)² + 2x²( x - 2y )
= x(x-2y)[(x-2y) + 2x]
= x(x-2y)(3x-2y)
please check for mistakes.
but this is the key idea: (2y-x)²=(x-2y)².
AC is the diagonal of the square.
To find the side length use Pythagorean Theorem.
a^2 + a^2 = 28^2
2a^2 = 784
a^2 = 392
a = sqrt 392
Perimeter = 4a where a is the length of the side
P = 4Sqrt392
P = 79.2 millimeters