What is 2 (3t + 4) - 2t equivalent to?

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle