Carmen's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Carmen $5.35 per pound, and type B coffee costs $4.10 per pound. This month's blend used twice as many pounds of type B coffee as type A, for a total cost of $271.00. How many pounds of type A coffee were used?

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

One integer is 8 times another. if the product is 72, then find the integers

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).