Which of each pair is smaller?:   A. 3.1×10-3  or 7.1×10-9   B. 1950 or 4.1×102 C. 0.0000009 or 7.3×102 D. 2.70×102  or 7×105

13.  A 60 g object occupying a 0.25 cm3 volume has a density of _________g/cm3.   A. 15   B. 0.0004   C. 240   D. 80   E. 4.2 x10-3

5. A large sheet of construction paper measures 20mm by 15mm and the volume is 4mm³, where V=lwt( please show work ) A. What is the thickness (t) of the paper in millimeters? (10^-3) B. What is the thickness of the paper in micrometers?(10^-6)

11. Satisfy the following calculations. Express your answer in scientific notation: 850,000 (9.0 x 10^5) -5.0 x 10^4 5.0 x 10^4 -5.00 x 10^4 5.00 x 10^4 12. Satisfy the following calculations. Express your answer in scientific notation: (3.6 x 10^-4) x (3.6 x 10^6) 1.296 x 10^3 1.29 x 10^3 1.3 x 10^3 1.30 x 10^3

Q23. The width of a man's hand was used as a common unit of length several hundred years ago. What are the advantages and disadvantages of using such a unit? Explain. E1. Suppose that a pancake recipe designed to feed three people calls for 600 mL of flour. How many milliliters of flour would you use if you wanted to extend the recipe to feed five people? E7. A crate has a mass of 9.40 kg (kilograms). What is this mass in grams? In milligrams?

1. The floor of a rectangular building has an area of 120 square meter. The length of the floor / is 4m bigger than its width, w. Solve for I. Hint: Start with the equation of the area in terms of I. What kind of equation do you get? /= 48.11 X feet ! No, that's not the correct answer.

1. In the calculation of the perimeter of a square measuring: 5.0 cm ±.05 cm by 5.0 cm ±.05 cm, What is the + error on the calculation of the perimeter of the square? you must show the correct equation in symbolic form, and your work to receive full credit)

How many One hectare is defined as 1.000x104 sq. m. One acre is 4.356x104 sq. acres are in one hectare?

Graph 3 Graph 1 Graph 2 2. What does Graph 2 represent? A. A decreasing slope. B. A variable slope. C. A constant slope. D. The area under the graph. E. An increasing slope. F. An inverse relationship.

6. Atoms of a certain element have a diameter of 108 cm. Given 1 km = 1,000 m and 1 m = 100 cm, about how many of these atoms can be fit along a line with a 1 Astronomical Unit length?