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Question 3 3.1 State the principles of chromatography. [2] 3.2 Identify the major differences between gas-liquid chromatography and liquid-liquid chromatography. [2] 3.3 Two different compounds of hormones were analyzed (Progesterone and Estrogen). Progesterone and Estrogen have retention times of 16.40 and 17.63 min , respectively, on a 30.0 cm column. An unretained species passes through the column in 1.30 min . The peak widths (at base) for Progesterone and Estrogen are 1.11 and 1.21 min, respectively. Determine, (a) The column resolution. [2] (b) The average number of plates in the column. [5] (c) The plate height. [3] (d) The length of column required to achieve a resolution of 1.5. [3] (e) The time required to elute substance A on the column with an Rs value of 1.5 . [3] (f) State two variables that affect the column efficiency. [2]

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Kaye's mother believes that sex is only appropriate in a loving relationship. What type of message is she sending Kaye? a. Procreational b. Relational c. Bidirectional d. Recreational e. Nonexploitative

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Find $\frac{dy}{dx}$ by implicit differentiation. and evaluate the derivate at the given point. $x^8 - y^5 = 0$, $(1, 1)$ $\frac{dy}{dx} = $ At $(1, 1)$: $y' = $

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Iestion 8 A polysaccharide is a polymer made up of which kind of monomers? fatty acids and glycerol nucleotides simple sugars alternating sugar and phosphate groups amino acids Moving to the next question prevents changes to this answer. F2 F3 F4 F5 estion8 A polysaccharide is a polymer made up of which kind of monomers? fatty acids and glycerol nucleotides simple sugars alternating sugar and phosphate groups amino acids A Moving to the next question prevents changes to this answer :0: 08 Q F2 F3 F4 F5 # 3 $ 4 % 5 6 E R T

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Find the inverse Laplace transforms in problems 8 & 9. 8. $F(s) = frac{7-2s}{3s^2+11s+10}$ 9. $F(s) = frac{x+8s}{(s+3)(s-2)(3s+4)}$

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Question 26 1 pts The graph below depicts the market for an artificially scarce good. At a price of $50, what area(s) represent the total social welfare in this market? Price 200 Demand (WTP) A 50 B C 0 Quantity B + C B C A + B A

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If the length of a rectangle is 3 times of its breadth and perimeter is 96cm. Find the length of the rectangle,

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\frac{4}{5} \times \frac{15}{8} = \frac{4 \times 15}{5 \times 8} = \frac{60}{40}

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Penny has $10,000 to invest. She is considering a certificate of deposit (CD) that is expected to yield 5%, a mutual fund expected to yield 7%, and stocks expected to yield 9%. The amount invested in the mutual fund can be no more than the amount invested in the CD and stocks together. The amount in the mutual fund and stocks must be no more than $8000. How much should Penny invest in each investment vehicle to maximize her total expected yield. Please show all of the work, so I will be able to have a better understanding of this, Thanks in advance.

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2.The numerator of a rational number is less than its denominator by 3. If the numerator becomes three times and the denominator is increased by 20, the new number becomes Find the original number.

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maxwell t.