# steff

Most popular questions and responses by steff
1. ## Supply and Demand

50) the monthly demand and supply functions for the Luminar desk lamp are given by p=d(x)= -1.1x^2 + 1.5x + 40 p= s(x)= 0.1x^2 + 0.5x + 15 respectively, where p is measured in dollars and x in units of a thousand. Find the equilibrium quantity and price.

2. ## chemistry

hi, I am wondering if benzyl acetate is polar or nonpolar? because it has a non polar benzene ring but also it has the ester bit attached so i am confused. Also i cant seem to understand the vander waal forces that are in it. if anybody could help that

3. ## Supply & Demand

42) Given the demand equation 3 + p -40=0 and the supply equation 2x - p + 10=0, where p is the unit price in dollars and x represents the quantity in units of a thousand, determine the equilibrium quantity and the equilibrium price.

4. ## Derivative

25) Suppose F(x) = g(2x^2 + 2). Find F(1) if g'(4) = -3. This is the question on my take home test. Seems to me that the question is wrong. Should it be f'(1) if g'(4) = -3? Your thoughts?

5. ## Calculus (demand)

18) The demand equation is x + 1/6p - 10+0. Compute the elasticity of demand and determine whether the demand is elastic, unitary, or inelastic at p=50. a) 5; elastic b) 1/9; inelastic c) 7/6; elastic d) 6; elastic I choose answer A. Is that correct?

6. ## Chemistry

can anybody think of a reaction that involves benzyl acetate? formula is CH3COOCH2C6H5 i already have most of the synthesis's but i really need a reaction that involves this ester as a reactant NOT a product. thanks :) Why don't you just cleave the ester

7. ## U-substitution (calculus)

this is an example from the book. I do not understand where the 1/2 comes from in (1/2u)du. Find indefinite integral. ((.3x-.2)/(.3x^2-.4x+2))dx u=.3x^2-.4x+1 du= 2(.3x+.2)dx 1/2u(du)= 1/2 In u + c 1/2 In(.3x^2-.4x+2) + c

8. ## derivative

41) Find the derivative. h(x)= (3x^2 + 1)^3 / (x^2 - 1)^4 This is where I am at the moment.... h'(x)= (x^2-1)^4 (3)(3x^2+1)^2(6x) - (3x^2+1)^3(4)(x^2-1)^3(2x) This is what I am trying to get....(not final answer) =2x(x^2-1)^3(3x^2+1)^2[(9)(x^2-1) -

9. ## chem

what kind of intermol forces can be seen in this molecule CH3COOCH2C6H5 is it only dispersion? If you mean BETWEEN molecules, then the O of the carbonyl will be slightly negative and some hydrogen bonding could occur with another molecule. Remember a few

10. ## Integration by parts

integrate (e^x-x)^2 dx

11. ## integration (calculus)

Find the indefinite integral. ∫((e^-x-1)/(e^-x + x)^2) dx I am trying to use the substitution method. u=e^-x + x du= -e^-x+1 dx Right so far?

12. ## derivative

29) Find the derivative of the function. F(X)=2x^2(3-4x)^2 This is what I have so far. I am usually pretty good at simplifying but I am missing something here. f'(x)=2x^2(4)(3-4x)^3(-4) + (3-4x)^4(4x) Here is where I go wrong. (Answer from book)

13. ## chem

I have a really urgent question. I am wondering wheter or not esters are polar and what types of intermolular forces they have. can anybody answer this question nvm

14. ## Calculus

help! ∫((ln x^2)/x)) dx u= ln x^2 du= 2 ln x dx (?) Not sure how to set this one up?

15. ## Calculus

Am I right so far? G(x)=e^x sqrt(1+x^2) =e^x(1+x^2)^1/2 =e^x(1/2)(1+x^2)^-1/2(2x) + e^x(1+x^2)^1/2 So I used product rule, chain rule, and exponential function with base e

16. ## Implicit (calculus)

Can someone explain implicit differentiation to me like I am a kindergarten? I am not getting it. Any hints to help me understand better?

17. ## derivative calculus

Please help. f(t)=(4+√t)(4t^2-5) This is what I have so far... (4+√t)(8t)+(4t^2-5) (1/2t^-1/2) Am struggling to get this in factored form. Am working on a multiple choice take home test and nothing I am getting matches.

18. ## Calculus derivative

Find the slope and an equation of the tangent line to the graph of the function f at the specified point. f(x)=-1/3x^2+5x+5: (-1, -1/3) Answer: f’(x)=-2/3x + 5 y=-2/3x -1 I re-worked the problem and got f'(x)=5, y=5x+ 14/3 This is from a multiple choice

19. ## Derivative Calculus

I just need my answers checked. 1) Find the derivative. f(x)=3x^5/4 - 8/9x^9/8 + x^2 - 9x + 1 Answer: f’(x)= 15/4x^1/4 - x ^1/8 + 2x -9 2) Let f(x)= 7x^3 - 9x. Find f’(5) Answer: f’(x)=21x^2-9 f’(5)=516 3) Find the given limit by evaluating the

20. ## science

how do you figure out intermolecular forces in a molecule? 1. You learn (memorize) the types of forces and what causes them. 2. You go through example molecules with those forces. 3. You learn to recognize types of molecules (fats, covalent long chain,

21. ## find the derivative

3 In (√x + 7)

22. ## calculus

Just want to check and see if I am setting this up right. Let y=f(x)=x^2-6x Find the average rate of change of y with respect to x in the interval from x=4 to x=5 (5^2-6*5)- (4^2-6*4)/ 5-4

where can i find the answers to a book i read ? The book is shark girl.

1. ## math

I love my mom

posted on November 21, 2016
2. ## french

just missing some accents!

posted on October 28, 2015
3. ## find the derivative

and help with this one... f(t)= e^7t * In (t+4)

posted on July 14, 2011
4. ## Calculus

Thank you!

posted on July 7, 2011
5. ## integration (calculus)

got it figured out.

posted on July 7, 2011
6. ## calculus

Thanks. I am on my ipad and it is such a pain to type this stuff out. I get a little lazy.

posted on June 15, 2011
7. ## derivative calculus

Thanks. I see my mistake now.

posted on June 15, 2011
8. ## derivative calculus

posted on June 15, 2011
9. ## Calculus derivative

Thanks. I was missing the step where you plug in the -1 to get slope.

posted on June 15, 2011
10. ## derivative calculus

Here are my options a) 10t^2+32t√t - 5 / √t b) 20t^2-64t√t - 5 / 2√t c) 20t^2+ 32t√t - 5 / 2√t d) 20t^2+64t√t - 5 / 2√t e) 10t^2-32t√t - 5 / √t

posted on June 15, 2011
11. ## Derivative Calculus

Thanks. I will check my answer.

posted on June 15, 2011
12. ## derivative

Should be =4x(3-4x)^3(-12x+3)

posted on June 11, 2011
13. ## Chemistry

I found this but wasn't sure how accurate is was: 4.) There is a major effect of the nitrate ion in solution on the color emission because the nitrate ion is the oxidizing agent in the compound without it you could not produce a spectrum so there would not

posted on February 24, 2011