Simple interest formula: A = P(1 + rt) where P is the Principal amount of money to be invested at an Interest Rate R% per period for t Number of Time Periods. Where r is in decimal form; r=R/100; r and t are in the same units of time.
-5 is for f(x)=x+5
4 is for g(x)=x-4
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The answer is D.( source trust me bro )
