Afactory produces 1,250,000 toys each year. the number of toys is expected to increase by about 150% per year. which model can be used to find the number of toys being produced, n (in millions), in t years?
a. n= 2.5(1.5)/t, t cannot = 0
b. n= 1.5t^2 + 1.25
c. n= 1.5t + 1.25
d. n= 1.25(2.5^t)

The library sells 376 books at its annual used-book sale. the sale takes in a total of $2119. children's books cost $4, and adult books cost $7. let x = number of children's books sold, and let y = the number of adult books sold. which system of equations can the librarians use to model this situation?