exam Maths Puzzle Numerical Ability

What is the step- wise solution for-

" If P=A/i[1-(1+i)^-n], find the value of P given that A=1500, i=0.08 and n=8"

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exam Other Question

The radius of a quarter is 12?
A) mm
B) cm
C) in
D) feet

This will be my last question, could someone please help me. Would the answer be cm? Or mm? I forget which one is wh Solve and write in interval notation for the solution set
1. /x+2/>_ 4

2. 2x-3 _< -5 or 2x + 1 >_ 2