An urn contains 2 red, 3 white, and 4 black balls. One ball is drawn from the urn, it is not replaced, and a second ball is drawn. (Enter your probabilities as fractions.) (a) What is the probability that both balls are white?

(b) What is the probability that one ball is white and one is red?

(c) What is the probability that at least one ball is black?

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota

The product of sin 30 degrees and sin 60 degrees is same as the product of