<PRE><B>Question 1140165</B>
John saves $3500 the first month and every month later decreases it by $75.

a) How much will John save in the 11th month?
b) How much will he save after two (2) years?
solution 
3500 3425   3350 --------- 11th -------------
a=3500 d=-75
a11=a+10d =3500+10x-75
=3500-750=2750
after 2 years means after 24 months means a25
a25=a+24d=3500+24x-75
=3500-1800=1700
sving in 11th month=$2750 
after 2 years saving=$1700</PRE>