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?

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14.7838 grams

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.

Ithink it is correct but just ask someone else but i am sure it it

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )