exam Maths Puzzle Numerical Ability

The volume of a sphere is a function of the radius of the sphere. Write a function for the volume of a ball. Evaluate the function for a volleyball of radius 10.5.

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exam Other Question

a line passing through (3,15) and (4,y) ia parallel to a line with slope -13. What is the value of y? A box of cereal bars is on sale for 2.96. How much does each cereal bar cost?
(let c= the cost of each cereal bar).