750 ml bottle of medicine costs $ 1.80 A 1.4 litre of the same medicine costs $3.50 a) Work out the cost for each bottle , in cents per milliliter .
b) Which bottle is better value for money ?​

The 750-milliliter bottle costs $ 0.0024 per milliliter, while the 1.4-liter bottle costs $ 0.0025 per milliliter, making the 750-milliliter bottle a better value.

Step-by-step explanation:

Given that 750 ml bottle of medicine costs $ 1.80, while 1.4 liter of the same medicine costs $ 3.50, to work out the cost for each bottle in cents per milliliter, and determine which bottle is better value for money, the following calculations must be done:

1.80 / 750 = 0.0024

3.50 / 1,400 = 0.0025

Thus, the 750-milliliter bottle costs $ 0.0024 per milliliter, while the 1.4-liter bottle costs $ 0.0025 per milliliter, making the 750-milliliter bottle a better value.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this