The changs updated their bedroom by purchasing a new lamp for $89.95 and a comforter set for $239.99. they paid 2007-03-04-00-00_files/i0120000.jpg % sales tax on their purchases. if the changs paid $351.72 total, determine if they paid the correct amount. a. the changs family paid $0.33 too much for their purchases. b. the changs family paid $0.99 too much for their purchases. c. the changs family paid $5.94 too much for their purchases. d. the changs family paid the correct amount for their purchases

In order to determine the correct answer, we need to confirm it first by making the solution below:
Costs: $89.95 = New Lamp
            $239.99 = Comforter
            6 3/5% = Sales Tax (convert this to decimal and we get 6.6%)
            $351.72 = Total amount the Chang's paid
Let's get the total costs first which is $329.94
6.6% of 329.94 is $21.78
The total cost with the tax would be $351.72.
Therefore, the Chang's paid the correct amount. The correct answer would be option D. The Chang's family paid the correct amount for their purchases.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm