A) Here is a number machine.
Input
Output
n
+ 2
x 3
Write down an expression for the output when the input is n.
b)
Here is another number machine.
Input
Output
Х
4x + 5
What operations should go in the boxes to make it work?

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?