Find The sum of the 9th term of an A , P if the first time is 3 and the cast tum is 54​

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

For the inequality |c| < |d| to be true, which of the following must be true?

Anyone know these questions? i need ,.