Pls help I will mark brainliest

They both have other different properties inside the atoms and different types of atoms, as there are more than 1 type of atom.

Explanation:

178

Explanation:

According to my calculations, and some review on the formulas, I concluded with the answer 178. I got this answer through these steps:

1. We must calculate the area of the rectangle, which is width times height (25 X 6) which equals 150. Now that we have summed this answer, we must find the area of the two semi-circles. We know the height of the rectangle is the diameter of both semi circles, therefore we can discover the radius which is half of the diameter, (3^2) pi which equals 9 pi, as there are two semi circles which will make a whole.

2. This is the final step is to plug in our answers.

150+3(9.424) which equals approximately 178.

I see you are in college, I am in 9th grade, so I apologize if this answer is wrong.