Mathematics and science go hand in hand. The branches of science which include: Physics, astronomy, chemistry, biology, etc. In all these fields you will find that you will have to use the mathematical principles and formulae to solve the numerical problems. So, science needs maths but maths does not need science.
Okay say one is 1 dollar so they're giving you 3 of them for 2 dollars. If you get 3 for 2 dollars it would be like getting one for free. Full price would be dollars so you would take 2/3 which is .6... so you would take that from 10 which Gould be 33%
Part A:
1) 16
2) -25
3) 9
4) -7
I'm too lazy to do the rest, just pay attention in class next time
Do you know your places? Like tenth place?