Tell whether the set of whole numbers is closed under each operation. Write yes or no. If your answer is no, give an example.
13. multiplication: a b
14. division: a = b
15. exponentation: ab
16. squaring the sum: (a + b)2

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)

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x

How do i do this activity, is appreciated