Question 7 A circle, C1, passes through the points A(4, 0) and B(0,8). Its centre, P, lies on the line
y = x + 1.
(a) (i) Show that the centre of the circle, Ci is (4, 5).
(ii) Hence find the equation of the circle, C.
(b) A second circle, C2, with the equation x2 + y2 + ax + by + 32 = 0, has the same
centre, P, as circle C.
(i) Find the value of a and of b.
(ii) Show that the circle C2 lies within the circle Ci.​

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

sure i'm up for it

step-by-step explanation:

t= half of the arc subtended by t.

r= half of the arc subtended by r.  

t+r= half of the arc subtended by t + half of the arc subtended by r= half of 360=180

step-by-step explanation:

the answer is  

d.

8 m

hope you got it down chief.