A circle is growing. At some time, the rate that the circumference of the circle is growing is equal to 5 times the rate that the area is growing. What is the length of the radius of the circle at that time?

up

step-by-step explanation:

the orientation of the parabolas can easily be found by analysing the power of x and y and their signs. if x is squared , parabola opens up and also if its coefficient is negative it opens down. if y is squared , the parabola opens right and also if its coefficient is negative it opens left. however in order to do the above analysis our equation must be in standard form .

our parabola is

which is not standard form of any parabola . hence we square on both hand side and convert it into standard form.

hence we see that x is squared and its coefficient is non negative . there for it opens up.

except a rational number. : )

step-by-step explanation:

its 50 miles away from the starting point