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> for the right triangle shown, which expression represents the length of ca?
7 sin(409)
7 cos(409)
sin(409)
tan(40%)

Which of those sequences is a geometric sequence

The parabola opens: y=√x-4 (principal square root) up down right left

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?