Answer:
<em>The compound inequality that shows the voltage amount the necessary range is
</em>
Step-by-step explanation:
Loni needs between 3.5 and 7.2 volts of energy, not inclusive, to make an experiment work correctly.
That means, <u>the voltage amount should be either greater than 3.5 volts or less than 7.2 volts</u>.
Suppose, the amount of voltage is
volts to make the experiment work correctly.
Now, Voltage amount is greater than 3.5 volts means:
or 
and voltage amount is less than 7.2 volts means: 
Thus, the compound inequality by combining the above two inequalities will be: 