Answer:
the correct answer is x = 2
As we knw that the dr/dt = 2
And The area of the circular slick is given by formul
A = (pi)r^2.
Now lets take derivative:
<span>dA/dt=2πrdr/dt
As we knw that radius is 25
so</span><span>dA/dt=2π(25)(2)=100π
which is equal to
=314.16 per minute this is how area is increasing
now for part b
</span><span> t = 4, the radius will have increased to 8 m.
now we will put the values in formula dr/dt
</span>so it will be.dA/dt=2π(8)(2)
=32π
=100.53 is the answer
hope it helps
Answer:
x=-4
Step-by-step explanation:
Both points are on same line x=-4
We would reach our office by 7:34 a.m.
<h3>How to find the time that we would take to travel from our house to the office?</h3>
The average speed is given as 30 miles per hour.
Let us convert this into miles per minute.
30 miles/1 hour = 30 miles/60 minutes
= 0.5 miles per minute
The distance between the house and the office is 12 miles.
Therefore, we can find what it would take to reach the office by dividing the distance by the average speed:
<em>Time taken = distance/average speed</em>
= 12 miles/0.5 miles per minute
= 24 minutes
The time is given to be 7:10 a.m. Therefore we would reach our office by 7:34 a.m.
Therefore, we would reach our office by 7:34 a.m.
Learn more about average speed here: brainly.com/question/6504879
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