A solid metal sphere with diameter 10cm needs to be covered with a protective material which costs £0.29 per cm2. How much will it cost to cover the sphere with the material? Give your answer rounded to 2 DP.

1083.45

Step-by-step explanation:

Diameter = 2r

Radius = 5cm because the diameter is 10.

4 pie r^2 is the surface area. = 314.2.

314.2/0.29 = 1083.45 Pounds

the functions have the same rate of change i think. i narrowed it down to this answer and "the rate of change of tour 1 is greater" but i got it wrong using that answer so im assuming its the answer above. (this is a question i also answered from the iready site if anyone needs a reference)