A geometric series with the first term 7 converges to 70. What does the common ratio equal? What does the second partial sum equal?
7/(1-r) = 70
1/10 = 1-r
r = 9/10
S1 = 7
S2 = 7 + .63 = 7.63
1/10 = 1-r
r = 9/10
S1 = 7
S2 = 7 + .63 = 7.63