1. You need to find the circumference of a small sphere. The measurement instruments at your disposal are a 1-meter ruler, a caliper, and a mass scale. Which of the following would be an appropriate plan for finding circumference? . a. Try to hold the sphere against the ruler and guess the length of the diameter. Then use the formula C= ad to find the circumference. b. Use the mass scale to find the volume of the sphere. c. Use the caliper to find a precise measure of the diameter of the sphere and then use the formula C= ad to find circumference. d. Try to bend the ruler around the sphere and guess the circumference. 2. If a polyhedron has 7 vertices and 14 edges, how many faces must it have? a. 9 b. 11 C. 13 d. 15 3. If a polyhedron has 10 faces and 10 vertices, how many edges must it have? a. 16 b. 18 c. 20 d. 22 4. If a polyhedron has 8 faces and 6 vertices, how many edges must it have? a. 10 b. 14 C. 12 d. 16 5. In calculating the perimeter around the base of a 3-dimensional structure you need to make the following calculation: 8.135 m + 10.34 m -5.16 m. Give the answer using correct precise units. a. 13.315 m b. 13.32 m c. 13 m d. 13.2 m 6. In calculating the perimeter around the base of a 3-dimensional structure you need to make the following calculation: 34.26 feet + 21.8 feet + 19.23 feet. Give the answer using correct precise units. a. 75.29 feet b. 75.5 feet c. 74 feet d. 75.2 feet7. The edge of a cube is measured to be 7.18 m long. Tell whether the volume is a direct or an indirect measure. Find the volume using correct precise units. a. Volume is a direct measure and is 370.146 cubic meters b. Volume is an indirect measure and is 370.1 cubic meters c. Volume is a direct measure and is 370.2 cubic meters :d. Volume is an indirect measure and is 370.15 cubic meters 8. The radius of a sphere is measured to be 5.1 inches. Tell whether the surface area is a direct or an indirect measure. Find the surface area using correct precise units. a. Surface area is a direct measure and is 326.85 square inches b. Surface area is an indirect measure and is 326.85 square inches . c. Surface area is a direct measure and is 326.9 square inches d. Surface area is an indirect measure and is 326.9 square inches 9. The edge of a cube is measured to be 2.3 inches long. Tell whether the volume is a direct or an indirect measure. Find the volume using correct precise units. a. Volume is a direct measure and is 12.167 cubic inches b. Volume is an indirect measure and is 12.2 cubic inches c. Volume is a direct measure and is 12.17 cubic inches d. Volume is an indirect measure and is 12.167 cubic inches 10. You are performing measures on the edges of a rectangular prism. You measure the length to be 4.28 inches, the width to be 5.7 inches, and the height to be 3 inches. Are these direct or indirect measures? Which is the least precise measure? a. They are direct measures, and the least precise measure is 4.28 inches b. They are indirect measures, and the least precise measure is 4.28 inches C. They are direct measures, and the least precise measure is 3 inches d. They are indirect measures, and the least precise measure is 3 inches