Respuesta :
I=PRT
P=principal
r=rate in decimal
t=time in years
first one
10% off is 100 less or 900
I=900*0.04*3
I=108
900+108=1008
2nd one
full price is 1000
1008>1000
cheaper to just pay it whtout interest
P=principal
r=rate in decimal
t=time in years
first one
10% off is 100 less or 900
I=900*0.04*3
I=108
900+108=1008
2nd one
full price is 1000
1008>1000
cheaper to just pay it whtout interest