An urn contains 6 red and 7 black balls. 4 balls are randomly drawn from the urn in succession, with replacement. that is after each draw, the selected ball is returned to the urn. what is the probability that all 4 balls drawn from the urn are black ? round your answer to three decimal places.

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?

Which expression is equivalent to -5(3x - 6/7)

Can some one explain this i got sent this. is this a threat i’m scared