choose the right answer.

two hundred fifty tickets are sold at a fund raiser. if sarah buys 15 tickets, the probability that she will win the prize quilt is
6%
7.5%
15%

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Can someone me and do the problem plz so i can understand it more better

One file clerk can file 10 folders per minute. a second file clerk can file 11 folders per minute. how many minutes would the two clerks together take to file 672 folders?