Tech Now, a technology company, began in 1980 with 226 customers. Since 1980, the number of customers is increasing. The following function represents the number of Tech Now customers t years after 1980, where r is the rate of growth. If the company has 1,574 customers 14 years after 1980, then what is the approximate rate of growth?
A.
0.74
B.
0.14
C.
0.51
D.
0.2