Every night, the average human body experiences an increase in melatonin levels, and then every day the levels decrease.

is this an example of a periodic event? explain.

Yes it is an example of a periodic event.

Step-by-step explanation:

If we represent this process by a continuous curve then we will observe that there will be ups and downs in the graph such that the cycle repeats itself every day

As we get maximum of the curve at night and minimum in the day and ir happens every day.

     Hence, this will represent an periodic event.

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign