What’s the area of this triangle??

In a right triangle the legs are base and height

area = (1/2) base × height = (1/2) 3 (4) = 6

6  square units

Sophia wrote the number 41.

Step-by-step explanation:

Let x by the two-digit number written by Sophie. Max appended a 3, so the new number is 10x+3.

The difference between Max's and Sophie's numbers is 372:

(10x+3)-x=372

9x+3=372

9x=369

x=41.

So, Sophie's number was 41.