You estimate the number of decimal places in the same amount as the decimal was in the original number.
Answer:
The square is inscribed in a circle that means the square is drawn inside a circle such that it's vertices lie on the circle.
You need to remember that the vertices of the square lie on the circumference of circle and the center of circle is also the midpoint of diagonals of the square i.e. Diagonal of the square is equal to diameter of the circle.
We could also see the image of such figure.
Evaluate all the absolute value first.
|-7|=7
|4|=4
Rewrite and solve using the order of operations
7+3*4
7+12
19
Final answer: 19