Cardi B
Step-by-step explanation:
It is decreasing in the time interval 0 < x < 2 hours.
Answer: 9
Step-by-step explanation:
Given
The function is 
To make it a perfect square, compare it with 
Here,

So, c must be square of b i.e. 9

Therefore, value of c is 9.
Answer:120in
Step-by-step explanation: