Recall the matrix [A] on page 302 that represents the number of math, science, and history textbooks sold at the main and branch campus bookstores this week.

a. Explain the meaning of the value of a32.
b. Explain the meaning of the value of a21.
c. Matrix [B] represents last week's sales. Compare this week's sales of math books with last week's sales.

d. Write a matrix that represents the total sales during last week and this week.

Transcribed Image Text:

83 33 [A] 165 20 98 50 80 251 [B65 15 1105 55