The formula for volume of a sphere is v=4/3 nr3, but what does the 4/3 mean and what am supposed to do with it?

Pleas its really urgent and i would really appreciate it! what is the value of x? enter your answer in the box. x =

One x-intercept for a parabola is at the point (-0.33,0). use the quadratic formula to find the other x-intercept for the parabola defined by the equation y=-3x^2+5x+2

Mr vale buys 48 flowers. he puts bunches of 6 flowers each in vases. if he sells each vase for $2, how much dose he earn?