<span>I got 2^(3/5) as the answer</span>
Your answer is A) s + n because sum means to add and A is the only choice with addition.
Hope this Helps!!
B at most 3 times
2 3/4 - 1 1/4 = 1 1/2
1 1/2 ÷ 1/2 = 3
used 1/2 ounce 3 times
so I'd say the answer is b at most 3 times because he couldn't have used it more than 3 times