So first,
$22.50 * .20= 4.5
Then, since is 20% off you subtract the percentage you get in which this case, it's 4.5.
$22.50 - 4.5 = $18
So the Jacket is $18.00!
Hope this helps, have a good day. c;
Answer:
Step-by-step explanation:

Let's get all of the terms with the
on the right-hand side of the equation, and everything else on the left-hand side of the equation.
To do this, we should add
to both sides of the equation to remove the
from the left-hand side of the equation:


Finally, to get the
by itself, we can divide both sides by
:


Answer:
True.
Step-by-step explanation:
It would be better if it was clearer, but I stand by my answer. "True".
Wavelength denotes the time for one cycle of a periodic process