Members of the video club choose a Personal Identification Number (PIN) consisting of two letters (from the 26 letter English alphabet) followed by two numbers. a) How many PINs are possible if letters and numbers cannot be repeated?

b) What is the probability that a thief obtained your video card and correctly guess is your PIN on the first try?

Write a fraction in lowest terms or a decimal to four places in the "show your work" box.

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

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.