use pemdas 60 - (20 - 45 / {(9 - 4) x 3]} write 3 steps please and i will give u brainliest if u correct :)

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.