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Direct variation

Which function is odd check all that apply a. y=sin x b. y=csc x c. y=cot x d. y=sec x

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

The radius of a sphere is 3 inches. which represents the volume of the sphere?