You would round it to
320 million
1) 2 bags cost $4 - from the graph
2) 1 bag would be just $2
PEMDAS
Parenthesis
Exponent
Multiplication
Division
Addition
Subtraction
ask yourself which one of these comes first in the given equation
hint: its the exponent
Answer:
(a) 305 visitors (b): Saturday to Sunday
I'm pretty positive it would be the second one from the top