Landon and his children went into a bakery and will buy donuts and brownies. Each donut costs $1 and each brownie costs $3. Landon has a total of $15 to spend on donuts and brownies. Write an inequality that would represent the possible values for the number of donuts purchased, dd, and the number of brownies purchased, b. b.

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?