What is the area of the figure?

a) 305 cm²

b) 315 cm²

c) 390 cm²

d) 400 cm²

Option C

A = 390

Step-by-step explanation:

The image shows a figure composed of a rectangle and a triangle.

We know that the area of a rectangle is:

Ar = length * width

Then, using the data shown in the image, we have to:

Ar = 20(15) = 300

Then, the area of a triangle is:

So:

Finally the area of the figure is:

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51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons