Kyle paid $5.25 for a cup of coffee and 2 muffire. Danielle paid $8.50 for 2 cups of coffee and 3 muffins. Fill in the following.
Each cup of coffee costs $
Each muffin costs $

1. are the triangles similar and if so why? what is the value of x? show your work.

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

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left