1st right gets brainiest

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap

What is the remainder when 2872 is divided by 76? a) 51 b) 57 c) 60 d) 63

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?