An airline offers a certain flight once per day that usually contains about 250250250 passengers. the flight offers seats in first class (most expensive), business class, and economy class (least expensive). the airline wants to survey 500500500 passengers of this flight about their overall satisfaction. the passengers will be selected using a cluster random sample where each flight is a cluster. why might the airline choose a cluster random sample instead of a simple random sample in this setting?

30 units^2

step-by-step explanation:

area is l × w

the length is 3

and the width is 10

3 × 10= 30 units squared

i dont get the question

step-by-step explanation:

i don't see any

step-by-step explanation:

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).