Imagine you have an urn containing 5 red, 3 blue, and 2 orange marbles in it. 1. what is the probability that the first marble you draw is blue?

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Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.