Assuming you're concerned with interest rate problems, r is generally involved in something like the formula ...
... i = prt
So, r will have the units of ...
... r = i/(pt) = (dollars)/(dollars·year) = 1/year
That is, r is <em>(some fraction) per year</em>.
_____
Often, the fraction is expressed as a percentage. The fraction will be unitless (as percentages are), leaving the units of r as year⁻¹.
Subtotal is the total amount of all the prices you ordered, and total is the sum of the subtotal and the tip.
So it’s neither of them...
Answer: 12
Explanation:
1/2 x 24 = 24/2 = 12
Hope this helps!
Best regards
