The answer is 1 1/6.
2/3+1/4+1/4
=2/3+2/4
=2/3+1/2
=4/6+3/6
=7/6
=1 1/6
As for the second question, yes.
Yes it is! Especially in chemistry and physics! Actually I'm pretty sure all types of science involves math
Answer:
Step-by-step explanation:

She should use 50% off.
964 divided by 1/2 = $482
964 - 400 = $564