How many cubes with a side length of 1/4 unit would it take to make a unit cube? explain how you determined your answer.

What is the number 321,000,000 in scientific notation? also what is the number? ?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. solve this quadratic equation using the quadratic formula. 2x2 - 2x=1 need asap

Can someone me with these two circle theorem questions asap?