Which situation results in a final value of zero? A the overall change in temperature when the temperature goes from −10∘F-10^{\circ}F−10 ∘ F to 10∘F10^{\circ}F10 ∘ F B the total profit made when a person buys an item for $2.25\$ 2.25$2.25 and then sells the item for $2.25\$ 2.25$2.25 C the overall change in altitude of a hot air balloon after rising 212121 kilometers from sea level D the total distance a person travels when he bikes 3.13.13.1 miles to school and then bikes 3.13.13.1 miles back home

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

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?