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A rock is thrown from the top of a building which measures 48 foot high. The graph shows the height, y, of the rock from the gro
und after x seconds. On which interval is the rock's height always decreasing?
A) x > 0
B) 0 < x < 2.5
C) 0 < x < 5.5
D) 2.5 < x < 5.5
A) x > 0
B) 0 < x < 2.5
C) 0 < x < 5.5
D) 2.5 < x < 5.5
1 answer:
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Answer: At x= 25 there is a break even point .
Step-by-step explanation:
Let the number of CDs be x
For the case of iTunes,
Cost of each CD = $12
For the case of Best Buy,
Number of CDs of free of cost = 5
Number of CDs more than 5 = $15
We need to find the "Break even point ":
According to question,
Hence, At x= 25 there is a break even point .