To calculate for the number of bars that Brittany can cut from the pan, we determine first the volume of the pan
volume of pan = (9 in)(10.5 in)(2 in) = 189 in³
Then, the volume of the bar,
volume of bar = (2 in)(1.5 in)(1 in) = 3 in³
Dividing the first answer by the second,
n = (189 in³)/(3 in³) = 63
Thus, the answer is 63.