10 pennies, 16 dimes, 19 nickles.
Sorry I'm not from US so I don't know your currency. Sorry about that. Hope what I have given you is enough. :)
Answer:
The common difference d in the given sequence is -17
Step-by-step explanation:
We need to find the common difference d of the following sequence 9 -8 -25 -42 -59
We have a₁ = 9
and a₂ = -8
The formula used is: 
By putting values we can find the value of d
We have n=2, a₂ = -8, a₁ = 9 and we need to find d

So, the common difference d in the given sequence is -17
Csc (3pi/2) = 1/sin(3pi/2)
According to the graph sin(3pi/2) = -1
So,
csc (3pi/2) = 1/(sin(3pi/2) = 1/(-1) = -1
The answer is -1