There are 2 sandwiches, 6 drinks, and 1 dessert to choose from. How many lunch specials are possible?

(40 points) i need some . an answer definition is appreciated as well.

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

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?