What is the value of b? 50 points in it for you plus a thanks, 5 star and brainliest.
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Answer: The original number of CDs is between 1000 and 1500.
Step-by-step explanation:
Since we have given that
Number of copies of a popular CD left to be sold in the store = 15
According to question, this is between 15 and 1.5% of the original number of copies of the CD in the store.
Let the original number of copies of the CD in the store be 'x'.
Now, 15 is equal to 1% of the original number of copies of the CD, it becomes
Or if 15 is equal to 1.5% of the original number of copies of the CD, it becomes
Hence, the original number of CDs is between 1000 and 1500.
Notice the picture below
you have the center, the h,k, all you really need is the radius "r"
you have the center, the h,k, all you really need is the radius "r"
Remember that c is the initial height. Since we the rocket is in a 99-foot cliff, c=99. Also, we know that the velocity of the rocket is 122 ft/s; therefore v=122
Lets replace the values into the the vertical motion formula to get:
Notice that the rocket hits the ground at the bottom of the cliff, which means that the final height is 99-foot bellow its original position; therefore, our final height will be h=-99
Lets replace this into our equation to get:
Now we can apply the quadratic formula
where a=-16, b=122, and c=198
or 
or 
or 
Since the time can't be negative, we can conclude that the rocket hits the ground after 9 seconds.
Lets replace the values into the the vertical motion formula to get:
Notice that the rocket hits the ground at the bottom of the cliff, which means that the final height is 99-foot bellow its original position; therefore, our final height will be h=-99
Lets replace this into our equation to get:
Now we can apply the quadratic formula
Since the time can't be negative, we can conclude that the rocket hits the ground after 9 seconds.