Si 45 personas construyen una casa en 180 días ¿ cuántos días se demoraran90 personas en construir la misma casa ?

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

What is the sum of these mixed numbers 2 1/8 + 4 3/8

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.