D) If the area of the base of a cuboid of height 3 cm is 10cm cube its volume is

Will give brainliest if you answer question correct

The floor plan of a room has a scale of 2.5 in.: 35 ft. in the drawing, the length of the room is 8 in. and the width of the room is 6 in. what is the perimeter of the actual room?

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer