A spherical balloon is expanding so that the radius increase at the rate of 0.5cm/sec. Find, the rate at which the surface area is increase when the radius is 24cm. Leave your answer in terms of pi.

and secondly: a cube has three sides painted blue, two sides painted red and one side painted green. The cube is rolled onto a flat table. What is the probability that at least one blue side will be at right angles to the surface of the table. How are you supposed to know what order the colours are in. there could be many different ways? right angles to the table means the blue would be on the side right?

thanks guys

and secondly: a cube has three sides painted blue, two sides painted red and one side painted green. The cube is rolled onto a flat table. What is the probability that at least one blue side will be at right angles to the surface of the table. How are you supposed to know what order the colours are in. there could be many different ways? right angles to the table means the blue would be on the side right?

thanks guys

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