Buzz had 7 lbs of dirt. His son used 3 and 3/5 of the dirt in his bucket. How
much dirt is left?

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

How do you find the circumfrance of a circle?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'