Sarah used a calculator to check her brother's math homework. When she tried to enter 15 into the calculator she found that the 5 key was broken. Write at least 3 number sentences that show how Sarah can show 15 on the calculator without using the 5 key​

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

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?

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.