Tony is using these numbers to make a new number: 12, 1, 4, 7. He can use brackets, +, -, x and the divide sign as often as he wishes.

He can't use any number more than once.

He cannot use powers.

He cannot put numbers together, eg he can't use 147.

What is the biggest number he can make and show how he can make this number. (MathsWatch)

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.