Question 551978
a. S(t) = 2000t + 58000


b. Just continue the pattern (or replace t with 15):


0-----58,000
5-----68,000
10----78,000


15----88,000


c. Set S(t) equal to 84000 and solve.


84000 = 2000t + 58000


26000 = 2000t


t = 13