How should this model be completed to represent 3,723 ÷ 51?

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Which of the following statement about pascal's triangle are true?

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old