Question

Stuck on c?

Answer 1

Looks like a direct proportion problem.

Answer 2

D(3)=6/25=100/A
A=2500/6

Answer 3

D = 2/25nA
n = 3, D(3) = 100
100 = (2/25)3A
A = 1250/3
When n = 5
D(5) = (2/25)(5)(1250)/3 = ?

Answer 4

D(5) = 500/3 = 166.67

But the easiest way to do this without finding A is recognizing this as a direct proportion problem.

So 100/3 = x/5 So x = 500/3

Answer 5

@ranga Oh I see, this makes sense. Thanks again!