In a study designed to test the results of cramming versus spaced practice, the researcher finds that students who crammed scored an average of 72 on the exam while students who spaced out their practice scored an average of 78 on the exam. if the value of sdifference is 2.5, what is the value of t?

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

Triangle xyz has vertices x(1,3), y(0,0)

What is the distance between point a and b