1. A carpet is to be installed in a room whose length is measured to be 13.71 m and whose width is measured to be 4.46 m. Find the area of the room. 2. A worker is to paint the walls of a square room 8.00 ft high and 12 ft along each side. What surface area in square meters must she cover? 3. An object in the shape of rectangular parallelepiped measures 2.0 in x 3.5 in x 6.5 in. Determine the volume of the object in m3. 4. One gallon of paint (volume = 3.78 x 103 m ) covers an area of 25.0 m . What is the thickness of the paint on the wall? 5. A rectangular plate has a length of (21.3 + 0.2) cm and a width of (9.8 + 0.1) cm. Calculate the area of the plate including its uncertainty. 6. How many significant figures are in the following numbers? (a) 78.9 + 0.2 (b) 3.788 x 10" (c) 2.26 x 106 (d) 0.0053