Question 9 of 10 The vertex form of the equation of a parabola is y = (x + 5)2 + 49.
What is the standard form of the equation?
A. y = 5x2 + 10x+ 74
O B. y= x2 + 49x + 35
O C. y= x2 + 5x + 49
O D. y= x2 + 10x + 74

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. 1.30 represents the number of mold spores marco had at the beginning of the study; 985 mold spores 1.30 represents the number of mold spores grown in a given week; 448 mold spores 1.30 represents the 30% rate of weekly growth; 345 mold spores 1.30 represents the 30% rate of weekly growth; 985 mold spores