Really Challenging SAT test prep question I need help with.?
December 28th, 2009 | 
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Posted in sat practice test | 
Tags: cd company, how much money, mail order cd, shipping cost, shipping fee
Hi and welcome to my blog,
I opened this blog to help anyone who is preparing for his SAT.
I remember myself when I started - I was so lost and in such a panic.
Luckily I got this great SAT guide that helped me a lot . So study hard and good luck!
Mail Order CD Company charges a shipping fee of .00 for the first CD, .50 for the second CD, and .00 for each additional CD. For example, the shipping cost for 3 CD’s is .00+.50+.00 a total of .50. If Sharon orders 20 CD’s, how much money would she save if they shipped 4 packages of 5 CD’, instead of 5 packages of 4 CD’s?
Posted in sat practice test |
Tags: cd company, how much money, mail order cd, shipping cost, shipping fee
Lets look at the two scenarios independentally.
How much would it cost to ship 5 CDs?
$2.00 for the first
$1.50 for the second
$1.00 for the third
$1.00 for the fourth
$1.00 for the fifth
For a total of $6.50
How much would 4 packages of 5CDs cost?
4 * 6.50 = $26.00
Now how much would 4 CDs cost?
$2.00 for the first
$1.50 for the second
$1.00 for the third
$1.00 for the fourth
For a total of $5.50
How much would 5 packages of 4CDs cost?
5 * 5.50 = $27.50
The difference between the two methods is $1.50 (27.50 – 26.00)
You are kidding, right?
5x (2+1.5+1+1) = uh
4x(2+1.5+1+1+1) = oooooh
Each package of 5 CDs will cost $2 + $1.50 + 3 * $1 = $6.50 => Total = 4 * $6.50 = $26
Each package of 4 CDs will cost $2 + $1.50 + 2 * $1 = $5.50 = > Total = 5 * 5.50 = $27.50
Sharon would save $1.50
Shipping method 1: (2 + 1.5 + 1 + 1) * 5 = $27.50
Shipping method 2: (2 + 1.5 + 1 + 1 + 1) * 4 = $26.00
$1.50 saved using shipping method 2.