A student uses a solution that contains 16 grams of water to conduct an evaporation experiment. At the end of one hour, the amount of water in the solution has decreased by 3.5%. At the end of two hours, the amount of water in the solution has decreased by another 4.25%. Which calculations can be used to determine the amount of water, in grams, remaining in the solution at the end of the second hour?

3.5% decrease means 96.5% remaining

0.965(16)

4.25% decrease means 95.75% remaining

0.9575(0.965(16))

= 14.7838 grams

Good evening

Step-by-step explanation:

Rule : _____________________________________________________

decrease something by p% then decrease by q% means multiply by

__________________________________________________________

Note : in our case the amount of water in the solution has decreased by 3.5% then by 4.25% consecutively____________________________________

Let’s apply what we have learnt:

the amount of water remaining in the solution at the end of the second hour is

Hope this helps.

answer: i think it is (1,-2)