Jim paid 750$ for his new computer. In addition, she paid 63.75 in taxes. What was the tax rate Jim paid on his new car

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

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

Anyone know? will mark brainliest if correct!