0.21 would be rational,because it is a terminating decimal,which means that it has an ending point and can be converted into a fraction.ur welcome
Answer: It is a <u><em>cuboid </em></u>in solid form
Step-by-step explanation: first draw the parallelogram on top and then draw the rectangle right under it and the join the vertices and you get a cuboid.
If you wanted to write 4/10 as a decimal it would be .4