Company A rents copiers for a monthly charge of $ 120 plus 8 cents per copy. Company B rents copiers for a monthly charge of $ 240 plus 4 cents per copy. What is the number of copies above which Company A's charges are the higher of the two?

How do i multiply two digit numbers

Acone is placed inside a cylinder. the cone has half the radius of the cylinder, but the height of each figure is the same. the cone is tilted at an angle so its peak touches the edge of the cylinder’s base. what is the volume of the space remaining in the cylinder after the cone is placed inside it?

Find the simplified product: 3e cube 9x to the fourth power times three cube 3x to the eighth