1370 , 1320 , 1070 , X, -6430
Choose the correct choice from the following:
A) -180
B) 6530
C) 6630
D) 6730
E) 6830
1370-50*(5^0)=1320   1320-50*(5^1)=1070   1070-50*(5^2)=-180   -180-50*(5^3)=-6430   -180NSWER:-180.
<result>A</result>
1370 , 1320 , 1070 , X, -6430