Find amount used:
Amount in the card = $20
Amount left = $13.28
Amount used = $20 - $13.28 = $6.72
Find duration of the call:
24 cents = 1 min
672 cents = 1/24 x 672 = 28 mins
Answer: The call was 28 minutes long.
2/3 + (-1/3) = 2/3 - 1/3 = 1/3
Wow ! Now THERE's an incentive ! I'm just glad I got in
early enough so that there's an answer block left open.
If you should happen to glance at these three problems,
you'll notice that they're all the same problem, just with
different numbers. So if somebody showed you how to do
ONE of them, you'd know how to do ALL of them.
1). Markup = 10% of $50 = 0.1 x $50 = $5
Selling price = ($50 + $5) = $55 .
2). Markup = 60% of $80 = 0.6 x $80 = $48
Selling price = ($80 + $48) = $128 .
3). Markup = 25% of $140 = 0.25 x $140 = $35
Selling price = ($140 + $35) = $175 .
<span>The density of a material is it's mass per unit of volume. So the units for density would depend on what you found the density of. </span>
Simple, take 7 1/9 and 2 4/5
and convert them
7 1/9=64/9
and
2 4/5=14/5
Find a common denominator
320/45
-
126/45
=194/45
Thus, m=194/45.
