Two stores sell CDs in packages, as shown in the table below If the rate at each store is constant, which statement correctly compares the cost of a package containing 20 CDs?
Answers
Given : Two stores sell CDs in packages
rate at each store is constant,
To Find : which statement correctly compares the cost of a package containing 20 CDs?
a: The cost at Store A is $2.00 greater than at Store B.
b: The cost at Store B is $2.00 greater than at Store A.
c: The cost at Store A is $1.00 greater than at Store B.
d: The cost at Store B is $1.00 greater than at Store A.
Solution:
CD Prices at Store A
Number of CDs in Package Cost
1 $0.70
12 $8.40
20 ?
45 $31.50
20 x 0.7 = 14.00 $
The cost at Store A = 14.00 $
CD Prices at Store B
Number of CDs in Package Cost
1 $0.60
20 ?
30 $18.00
65 $39.00
20 x 0.6 = 12$
The cost at Store B = 12.00 $
14 = 12 + 2
The cost at Store A is $2.00 greater than at Store B.
Correct option
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which statement correctly compares the cost of a package containing 20 CDs
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