An item was selling for 72 is reduced to 60. find a percent
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<u>QUESTION 1</u>
The given function is
If decreases by
, then the new value is
.
We need to find the value the function at which is
This simplifies to
The increment in is given by;
This simplifies to,
This further simplifies to
Therefore the corresponding increment in is
.
<u>QUESTION 2</u>
The given function is
.
If increases by
, then the new value of
is
.
The increment in is given by
We expand the brackets to get,
We simplify further to obtain,
Therefore the corresponding increment in is
.