Sally has been measuring the tree in her yard for a science project. The tree has grown 12 of an inch each month and grown a total of 2 inches taller. How many months has Sally been measuring this tree?

Sally has been measuring the tree for 4 months

Step-by-step explanation:

The correct question is as follows;

Sally has been measuring the tree in her yard for a science project. The tree has grown 1/2 of an inch each month and grown a total of 2 inches taller. How many months has Sally been measuring this tree?

Solution;

The tree has grown 1/2 of an inch each month and has grown a total of 2 inch taller.

We now need to know the number of months in which the measuring has been taking place.

To know the number of months, we simply need to divide the change in height which is 2 inch by the individual month growth rate which is 1/2 inch

So mathematically, that would be 2/1/2 = 2 * 2 = 4 months

Let 
x> Paul earns tips
y> Colin earns tips
z> Brian earns tips
we know that
x+y+z=£71.10
and
the ratio is 2:3:4
therefore
x/y=2/3     x/z=2/4   y/z=3/4

the question is 
How much more does Colin get over Paul?
Colin> y
Paul> x
y/x=3/2> y=x*(3/2)> y=1.5x> Colin=1.5 Paul

the answer is
Colin did 1.5 times more than Paul