If the circumference of a spherical object is 43.96 cm, what is the surface area of the object? Use 3.14 for pi im doing math with surface area fora sphere

C=2pir

SA=4pir^2

43.96=2pir

divide both sides by 2

21.98=pir

divide both sides by pi (aprox pi to 3.14)

7=r

SA=4pir^2

SA=4pi7^2

SA=4pi49

SA=196pi

aproxpi=3.14

sa=615.44 cm^2

Solutions

Finding the sum of all the areas of each face on a 3-D object is called calculating the surface area. To calculate the surface area you use the formula c=2πr.

Calculate

SA = 4πr²

43.96 = 2 πr

Divide each of the side by 2

43.96 = 2πr : 2

21.98 = πr

divide both sides by π (approximate π to 3.14)

7=r

SA=4πr²

SA=4π7²

SA=4π49

SA=196pi

SA = 615.44 cm²