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. Exercise 8: a. 42.35 - 0.55 = 41.8 mL b. The moles of EDTA4- : 0.0189M*(41.8*10-3)L=7.9*10-4mol c. Zn2+(aq)+EDTA4-(aq)—Zn(EDTA)2-(aq) The ratio Zn2+ and EDTA4- is 1:1 The moles of Zn2+= the moles of EDTA4-=7.9*10-4mol d. 7.9*10-4mol*65.39g/mol=0.0517g Zn e.
n −1 [ X100/201] Page two Marks ALL questions should be attempted. 1. y A 10 8 6 4 2 0 2 4 6 8 B 10 x Find the equation of the straight line AB shown in the diagram. 3 2. The pupils in a primary class record their shoe sizes as shown below. 8 5 7 8 (a) 7 7 8 6 6 11 7 5 5 7 9 9 6 7 6 7 Construct a frequency table from the above data and add a cumulative frequency column.
Name Class Date 8-1 1. 3s3t3 Practice Adding and Subtracting Polynomials Form K Find the degree of each monomial. 2. 3n 3. 5xy 4.
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.
e. Use the model from part c to estimate the time at which the area is 525 square feet. 45. Write the function f(x) = x2 + 10x - 13 in vertex form. Identify the vertex. 46.
"The production of these two slip-on products both require processing in our assembly department and our finishing department." Handel pauses. "I've e-mailed you a table showing how long each batch of loafers takes in the two departments, and the profit per batch." Product Assembly Department Finishing Department Profit per batch Batches of Tassel Loafers 2 hours 8 hours $800 Batches of Penny Loafers 6 hours 4 hours $1,200 "I've also sent the available capacity, in hours, for both departments and the
Chapter 6 8. 1. The parameters of the opportunity set are: E(rS) = 15%, E(rB) = 9%, sS = 32%, sB = 23%, r = 0.15, rf = 5.5% From the standard deviations and the correlation coefficient we generate the covariance matrix [note that Cov(rS, rB) = rsSsB]: Bonds Stocks Bonds 529.0 110.4 Stocks 110.4 1024.0 The minimum-variance portfolio proportions are: wMin(B) = 0.6858 The mean and standard deviation of the minimum variance portfolio are: E(rMin) = (0.3142 × 15%) + (0.6858 × 9%) = 10.89% = [(0.31422 × 1024) + (0.68582 × 529) + (2 × 0.3142 × 0.6858 × 110.4)]1/2 = 19.94% % in stocks % in bonds Exp. return Std dev. 00.00 100.00 9.00 23.00 20.00 80.00 10.20 20.37 31.42 68.58 10.89 19.94 Minimum variance
Then divide each term by GCF to determine what is left inside the parentheses.) Example 2: 18x2y3z5 - 24x5y2z + 30x3y4z2 Solution: 6x2y2z(3yz4 - 4x3 + 5xy2z) 2. Look to see if it is a difference between two perfect squares. (need 4
Problems Problem 1 The following is a demand schedule for shoes: Price: $100 $80 $60 $40 $20 Quantity: 10 14 18 22 26 -A- Illustrate the demand curve. |Price |Q D |QS | |
Since it is a 2 × 2 table, try also a two-tailed two-sample z test for π1 = π2 (see Chapter 10) and verify that z2 is the same as your chi-square statistic. Which test do you prefer? Why? (Data are from Consumer Reports 56, no. 8 [August 1991], p.