The graph shows how the total Justin Jack has walked depends on the number of chips he has made of school

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?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.