A parent died and left any state to four children. One inherited 2/9 of the estate, the second inherited 19/81, and the third inherited 12/27

Which of the following are parts of a sphere

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?