Answer: 1.5
Step-by-step explanation:Let the standard deviation of the shoe size be represented by ' ' and the mean shoe size be represented by ' = 7.5'. Also, the sizes of the shoe be represented by ' '. So, . Hence, the standard deviation of the shoe size data for the math class is 1.5.
16.72p + 9 ≤ 133
16.2p ≤ 124
p ≤ 124 / 16.2
the teacher can order at most
7 whole pizzas