Which diagram shows plane pqr and plane qrs intersecting only in qr

Since you didn't put any choices, I'm ASSUMING, Your choice is:

 The Diagram that shows, Plane PQR and Plane QRS, Intersecting only in QR is >  Letter Choice, C >  Q,      <P,      <R,   <S  

Hope that helps!!!    : )

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).