Answer:
Teachers to Students: 1:9, 1 to 19, 1/19
Students to teachers: 19:1, 19 to 1, 19/1
(If this is wrong the answers might be different for you but this is what I got an I was right)
Answer:
21.2
Step-by-step explanation:
Given

on the interval 0 ≤ x ≤ 7, for maximum value, f'(x) = 0.
Answer:
0.625
the pictures I attached are the work. the pictures are in order from 1 to 5 in red.