Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Shipping cost of something is defined like that: when the [#permalink]
06 May 2006, 03:46
Shipping cost of something is defined like that: when the value is x<=100, cost is $3; when 100<x<=500, cost is D=(200+x)/100; when x>500, cost is $7. Now, someone shipped 2 batches of goods. Is the total value greater than 499?
1) One of the costs is $3
2) The total cost is $10
stmt 1 is insuff since we don't know the shipping cost of the second object.
stmt 2 is Suff. Since total cost is $10. If one othe cost is $3 then the other one is $7 that means its >500. Lets say if its $4 +$6, still using the given formula the prices have to be over 499.