Until 1995, the rules for three-digit area codes in the United States were as follows: The first digit could not be 0 or 1. The second digit had to be 0 or 1. The third digit had no such restrictions. In 1995, the restriction on the second digit of area codes was removed. How many area codes are possible after the restriction is removed?

Can i get some on 18,20,& 22? or one of them

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

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air