Question

Marco is studying a type of mold that grows at a fast rate. He created the function f(x) = 345(1.30)^x to model the number of mold spores per week. What does the 1.30 represent? How many mold spores are there after 4 weeks? Round your answer to the nearest whole number
A.1.30 represents the number of mold spores Marco had at the beginning of the study;985 mold spores
B.1.30 represents the number of mold spores grown in a given week;448 mold spores
C.1.30 represents the 30% rate of weekly growth; 345 mold spores
D.1.30 represents the 30% rate of weekly growth;985 mold spores

Answer 1

1.3 means it grows 30% per week

345 (1.3)^4 = 985