Aconstruction company now wants to build a 100 meter high tower as quickly as possible. the company has unlimited resources and an unlimited budget and is willing to spend any amount to get the job done.

the tower is to be built with blocks that are 5 meters long and 1 meters wide, but only 1 meter tall. the blocks interlock on top and bottom (like legos).

they cannot be stacked sideways. using special lifters, putting one stack on top of another stack takes one week regardless of how high the stacks are.

what is the shortest amount of time that it will take to build the tower?

Naruto is choosing between two venues that will deliver food to his house. with probability 1/3 he will choose ramen mania (r), and with probability 2/3 he will choose sushi (s). if he chooses r, 15 minutes after making the call, the remaining time it takes the food to arrive is exponentially distributed with average 10 minutes. if he orders s, 10 minutes after making the call, the time it takes the food to arrive is exponentially distributed with an average of 12 minutes. given that he has already waited 25 minutes after calling, and the food has not arrived, what is the probability that he ordered from r? i am really stuck on how to set this up, so if you could be extra clear, that would be super ! in advance