of an ice cream cone (the circular he ice cream) is m 12 in2, about 3.14 in2. According to the volume formula for cones, the volume of an ice cream cone is .4.5-3.14 in, about 4.7 in. Since each fluid ounce is 1.8 in3, the number of fluid ounces the cone holds is the number of 1.8 in in 4.7 in which is 4.7 1.8, about 2.6 fluid ounces b. Describe a hands-on activity that could help students understand the distinction between surface area and volume. 5. In your own words, explain why the volume (height)-(area of the base) formula is valid for right prisms using the example of a prism that is 5 cm high and that has a base of area 8 cm2 6. Discuss how to use blocks to explain why the (height).(area of base) formula for the volume of a prism is true (for the case of right prisms where the height and area of the base are whole numbers). In your explanation, be sure to at- tend to the meaning of multiplication, the meaning of volume, and the units you are using. volume 7. A cylindrical container has a base that is a circle of diameter 8 cm. When the container is filled with 250 mL of liquid, the container becomes full. How tall is the container? Explain your reasoning. 8. One liter of water is in a cylindrical container. The water is poured into a second cylindrical container whose radius is the radius of the first container. Describe how the water level in the second container compares to the water level in the first container. Be specific and explain your reasoning 9. a. Measure how fast water comes out of some fau-

A cereal box measures 2 in. by 8 in. by 10 in. What is the volume of the box? How many square inches of cardboard make up its surfaces? Disregard any hidden flaps.

The gasoline tank on an automobile is box-shaped with dimensions of 24 in. by 20 in. by 9 in. If 1 ft3 corresponds to 7.5 gal of gasoline, What is the capacity of the automobiles fuel tank in gallons?

As in Exercise 39, find the volume of the box if four congruent squares with sides of length 6 in. are cut from the corners of a rectangular piece of poster board that is 20 in. wide by 30 in. long. Kristine creates an open box by cutting congruent squares from the four corners of a square piece of cardboard that has a length of 24 in. per side. If the congruent squares that are removed have sides that measure 6 in. each, what is the volume of the box formed by folding and sealing the flaps?