Answer:
16m
Step-by-step explanation:
4 x 2 = 8
8 x 2 = 16
21 + 28 = 49 students
Ration of history 21 to students 49 = d)21:49
PEMDAS
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
It would be 56/177. If you need any question how I got that answer, ask me.. :)
