The radius of the sphere decreases at the rate of 6 m/ sec
That is, 
Surface Area of the sphere of radius r is given by 
Differentiating with respect to t,


It should be B
Because the slope of AB is 6/5 and when you are finding it’s perpendicular bisector then the slope of that line should be the negative reciprocal, it should be -5/6.
I don’t know what the question is, your just saying that
Answer:
about $12
Step-by-step explanation:
59.61(0.20)=11.922
11.922 rounded up is 12.
ur total bill would be $71.61
This should be your answer