To construct a line passing through point that is parallel to the line AB Han constructed the perpendicular bisector of AB and then drew line CD. Is CD guaranteed to be parallel to AB? Explain how you know.

Find the amplitude of a sinusoidal function that models this temperature variation

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The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.