Answer:
The two grades that have a proportional relationship between the numbers of girls and boys are and grade 6 and 8
Step-by-step explanation:
Girls: Boys
9 : 12 (grade 6)
15 : 20 (grade 8)
3 : 4
Do you know how to write that equation at the start that is
f(S) = {s
Angle p = inverse cos 5/13. With a calculator I got 67.38°
The numerator is 4 and the denominator is 5