Answer:
Step-by-step explanation:
x=5c, c=3.14d
x=5(3.14)d
d=x/15.7, x=43.18ft
d=43.18/15.7
d=2.75ft
there must be at least 6 chaperones
25 x 3= 75 so 2 chaperons x 3= 6 with a remainder of 5 students
25 x 2 = 50
140-50 = 90 dollars left
the length of the line is 7
it is b. 7