It's NOT CORRECT
A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10
86130600000.0 standard form to scientific notation should be equal 8.61306 x 10^10
You see, that it's divided into triangles. Find the area of each triangle using the formula: the area of triangle is base*height*1/2. Then, add all the areas altogether.
A would be the answer.
Step-by-step:
Pythagorean theorem-
a^2+b^2=c^2
24^2+45^2=c^2
576+2025=c^2
2601=c^2
square 2601= square c^2
51=c
Of course! 2 of the square root of six is roughly 4.89, rounded up being 5.