Sophie is buying a gold chain. The gold chain costs $2.50 per centimetre. How many centimetres can she buy if she has $30 to spend? *

12 centimeters

Step-by-step explanation:

30/2.50 is 12

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!

true

step-by-step explanation: