A teacher purchased 250 pencils for her students to borrow throughout the school year. About 10% of the pencils were used up each week. Which equation can be used to determine the approximate number of pencils, p, the teacher has remaining after t weeks?

Will mark brainliest for correct answer! i have been on this problem for an hour and can't find the answer. i'm begging here! incase you cant read the instructions in the picture because of too much or too little lighting: note: enter your answer and show all the steps that you use to solve this problem in the space provided. write a list of steps that are needed to find the measure of b. provide all steps as clear as possible, !