Sunday
April 20, 2014

Posts by Rin


Total # Posts: 9

Biochemisty
The DNA alpha-helix structure has 566900 complete turns. The average molar mass of one base pair of nucleotides in DNA is approximately 469 g/mol. If the spacing between successive base pairs is about 0.69 nm, and a complete turn in the helical structure of DNA occurs every 6....

Physical Science
17. Based on the chemical equation, the reaction is endothermic. Increasing the temperature will favor the forward (left to right) reaction. Or you may think of the heat as one of the reactants. If you increase heat, then the amount of products will also increase. Otherwise, i...

Calculus - please help!
How do you do this? Find the volume generated by revolving the area bounded by the ellipse(x^2)/9 + (y^2)/4 = 1 about the line x=3.

math
A function f(x) has domain [0,25), range (-∞,5], and intercepts (2,0), i(17,0), 0,9). A function h(x) has domain (-∞,16), range (-∞,42) and intercepts (3,0), (0,-10). Find the domain of each of the following. 1. f + h 2 f/g 3. f*g

trig
By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx

trig
By expressing 3x as (2x + x) prove that cos3x = 4cos^3x - 3cosx

MATH
The eaves of a roof sloping at 23° overhand the walls, the edge of the roof being 75 cm from the top of the wall. The top of the wall is 5.4 metres above the ground. What is the height above the ground of the edge of the roof, to the nearest centimeter?

need help with homework question
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Math-approximation with fractions:7th grade math
yeah this is sooooo hard, does anyone understand? I got to do this for problems 14.-19. Its 7th grade math work page 4.5 Anyone got the same?

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