How much of a 70% orange juice drink must be mixed with 7 gallons of a 10% orange juice drink to obtain a mixture that is 50% orange juice?

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.