What type of scientist studies have bacteria are affected by antibiotics?
A=P(1-r)nWhere P= principalr= rate of depreciationn=number of terms (years)Compare with compound interest: A=P(1+r)nExample : a TV originally worth $1250 depreciates at 6% pa.What is it worth after 7 years?A=P(1-r)nP=$1250r=6% =0.06n=7yearsA=1250 (1-0.06)7A=1250 (0.94)7A=1250 x 0.648A=$810.60The TV is worth $810.60 after 7 years.By how much has the TV depreciated over this time?Original value: $1250Current value: $810.60Depreciation = $1250-$810.60=$439.40The TV has depreciated by $439.40 in 7 years.Ex 4jA=P(1-r)nP=$2800r=25% =0.25n=3years