A university has 28,140 students. In a random sample of 165 students, 11 speak three or more languages. Predict the number of students at the university who speak three or more languages.

Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. the mean arrival rate is 10 passengers per minutes. compute the following probabilities. p(x = 4) p(x > 11)

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0