Find the whole using the percent equation. 18 is 6% of what number?

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)

Me. i can't figure out this question. give an explanation too. .

Write the expression as a single natural logarithm. 2 in a - 4 in y