What is the only unknown (variable) needed to find the volume of a sphere?

Sphere

The radius of the sphere is the only unknown variable need to find the volume of a sphere.

Step-by-step explanation:

Sphere is a geometrical three dimensional round figure with every point on its surface equidistant from its center. It is a three dimensional representation of a circle. A line which connects from the center to the surface is called radius of the sphere.The diameter of the sphere is the longest straight line which passes through the center of the sphere.

The volume of sphere is given by:

Volume of sphere(V) =

where V is the volume of the sphere

r is the radius of the sphere

 = 3.14

Hence the only unknown variable to find the volume of a sphere is the radius.

The formula for computing the amount of simple interest is:

I = Prt

Where P = principal amount of the loan

             r = interest rate of the loan

             t = duration of the loan

Substituting the amounts in the formula,

I = (150,000) (6.5%) (3)

  = 29,250

To compute for the maturity value, you have to add the interest to the principal amount:

Maturity value = 150,000 + 29,250 = 179,250