What is the answer for number 18 and 19

A and C. Simple multiplication. Just ignore the zero and multiply 3 times 6 then add the zero after to get 180

For 18 the answer is 180
and for 19 the answer is 360. you use multipication

Where the white dots are is where your points should be plotted.a translation is simply just moving something from one place to another. in this case, you would move each plot point of the original shape 2 units up, and 5 units to the left.

The density of the cube is 40