Final answer:
Ms. Sanders will need to make 75 cookies for the writing party.
Step-by-step explanation:
To find out how many cookies Ms. Sanders needs to make, we can multiply the number of students in her class by the number of cookies each student will receive. Since there are 25 students and each student will receive 3 cookies, we can multiply 25 by 3 to get the total number of cookies needed.
25 students * 3 cookies/student = 75 cookies
Ms. Sanders will need to make 75 cookies for the writing party.