Idon't now how to do that maths. what is1/4 of 8

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Is appreciated! graph the functions and approximate an x-value in which the exponential function surpasses the polynomial function. f(x) = 4^xg(x) = 4x^2options: x = -1x = 0x = 1x = 2

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?