Determine the missing term in the proportion 3:_=15:25

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

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

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?