I am not able to Anwser this question although I may be able to figure it out
Given that the ball has a thickness of 1 cm and the radius at the outside is 5 cm, thus the radius from inside is 5 - 1 = 4cm.
The <span>approximate volume of rubber used to make the ball is given by the volume of the ball at the outside surface minus the volume of the ball at the inside surface.
i.e.
</span>
<span>

</span>
The answer is 8 since it’s 7 7/10 the nearest whole number is 8 because 5-9 mean you round up and 1-4 mean u round down.
For example if you were rounding 10 3/10 to the nearest whole number your answer would be 10.