Gerald drove his car 360 miles on a trip. He used 20 gallons of gasoline. Which of the following is a unit rate that describes the distance Gerald drove per gallon of gasoline used? A
18 miles per gallon

B
18 gallons per mile

C
340 miles per gallon

D
340 gallons per mile

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