1 cm represents 3.5km 2.4cm represents x km

Here,

1 cm = 3.5 Km

2.4 cm = ?

Now,

1 cm = 3.5 Km

2.4 cm = (3.5 * 2.4) Km

= 8.4 Km

It is right answer..

Hope it's help you...

Thanks♥♥

its definatley   this on your answer choice?

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).