[2] iii) Find the equation of the circle. [2] iv) The line y + 5x = 8 cuts the circle at A and again at a second point D. Calculate the coordinates of D. [4] v) Prove that the line AB is perpendicular to the line CD. [3] 5. Find the angle ( and the length x in the triangle shown below. [7] 6.
The second mean (the mean for N=400): | 100 | 6c. IQ question. The first SD (the SD for N=100): | 1.6 | 6d. IQ question. The second SD (the SD for N=400): | 0.8 | 7a.
Radicals Tips 1. Make sure that one of the two factors of the radicand (expression under the radical) is the largest perfect square: Example: Simplify 72 Correct 72 = 36 ∙ 2 = 62 Incorrect 72 = 9 ∙ 8 = 38 2. To be able to add or subtract radicals, the radicands must be the same. Example 1: Add 32 + 52 Answer: Since radicands are the same, (3 + 5)2 = 82 Example 2: Subtract 73 - 3 Answer: (7 – 1)3 = 63 Example 3: 318 - 52 (Must simplify first) 39 2 - 52 3 ∙ 3 ∙ 2 - 52 92 - 520 Answer: 42
0.0625mol/0.125M=0.5L=500mL Calculation for preparing the EDTA solution Exercise 6 a. 1L*0.02M=0.02mol 0.02mol*372.24g/mol=7.4g EDTA b. Exact molarity of 7.4448g /1.00L would be .0200 M Exercise 7 a. 0.5M*100*10-3L=0.05mol acetic acid b. 0.05mol/6M=8.3*10-3 L=8.3mL stock solution c. 100mL-8.3mL=91.7mLwater Add 91.7 water to 6M stock solution to prepare 0.5M acetic acid.
Use the report pages below to record your data. Answer questions A-G found on pages 46 and 47. Name: _________________________ Lab 2 Report Data: Data Table 1: Length Measurements | Object | Length (cm) | Length (mm) | Length (m) | CD or DVD | 12.1 cm | 121 mm | .121 m | Key | 5.1 cm | 51 mm | .051 m | Spoon | 16.1 cm | 161 mm | .161 m | Fork | 18.5 cm | 185 mm | .185 m | NOTE: The instructions indicate to measure the objects to “one degree of uncertainty.” The degree of uncertainty is a property of the instrument used. All three recorded values will have the same precision. On page 29 is the explanation of uncertainty.
B. C. D. 80° 100° 180° 200° and ? MA.912.G.2.2 4. What regular polygon has an exterior angle that measures 60 degrees? A. B. C. D. Square Regular hexagon Regular pentagon Equilateral triangle MA.912.G.
If the base is 30 feet, and the corresponding height is 25 feet, what is its area? 10. Write each percent as a decimal and as a fraction in simplest form: a. 200% b. 135% c. .03% d. .45%
The radius of a circle is (7x + 3) cm. Write an expression to represent the area of the circle in simplified form. 23. A rectangle has a length of (x + 2) in. and a width of (2x + 3) in.
What is the difference in degrees? A: 3.25 degrees Q: Which lines of latitude are defined as standard parallels for this projection? A: 29.5 and 49.5 degrees latitude Exercise
The central angle? ________ 18. The 1x side of the 30-60-90 triangle within our original hexagon?_________ 19. What is the side of the hexagon? ______ 20.