Tuesday
September 16, 2014

Posts by Hannah


Total # Posts: 2,850

Ecology
Menge and colleagues performed experiments in which they exposed some populations of mussels to sea stars and excluded sea stars from other mussel populations. Suppose that the sea star population consists of 20 individuals and the two populations of mussels are of the same ...
April 11, 2010

Ecology
Across various sites within the rainforest of Panama, different species of trees are found with little overlap among sites. Based on this species turnover, Panama’s rainforest is best described as having _______ diversity a) low gamma b) low alpha c) low beta d) high beta...
April 11, 2010

communication
Scholars agree that our basic emotions are happiness and anger. True or False
April 11, 2010

Plant Physiology
I'm confused about the oxygen evolving complex step in photosynthesis..From what I can understand so far, a P680 pigment molecule gets excited in PSII forming P680* which then loses an electron to form P680+ which is a strong oxidant. This then splits 2 water molecules ...
April 9, 2010

social studies
How do people choose where to settle and live ?
April 8, 2010

PLZ HELP!!!! communication
DEFINITION----Selective listening: Involves focusing only on particualr parts of communication QUESTION---Selective listening is effective because we focus on the most important parts of a message. True or False my only problem is the deffiniton says particular while the ...
April 4, 2010

communication
DEFINITION----Selective listening: Involves focusing only on particualr parts of communication QUESTION---Selective listening is effective because we focus on the most important parts of a message. True or False
April 3, 2010

Math
Hi can someone help assist me with my math problems dealing with probability If 80% of scheduled flights actually take place and cancellations are independent events, what is the probability that 3 separate flights will all take place? A) 0.51 B) 0.01 C) 0.64 D) 0.80 ...
April 2, 2010

Math
Thank you!!
April 1, 2010

Math
An airplane's velocity with respect to the air is 580 miles per hour, and it is heading N 60 degrees W. The wind, at the altitude of the plane, is from the southwest and has a velocity of 60 miles per hour. What is the true direction of the plane, and what is its speed ...
April 1, 2010

chemistry
I have a molar mass for a condensed vapor: 95.935 g/mol. What are a few of the potential identities of the unknown liquid from which the condensed vapor came from?
April 1, 2010

Pre-Cal
An airplane's velocity with respect to the air is 580 miles per hour, and it is heading N 60 degrees W. The wind, at the altitude of the plane, is from the southwest and has a velocity of 60 miles per hour. What is the true direction of the plane, and what is its speed ...
March 31, 2010

Pre-Cal(urgent)
Nevermind.
March 31, 2010

Pre-Cal(urgent)
Find u X v, where Q is the angle between u and v. magnitude of u =4 magnitude of v=10 Q=2pi/3 The Q is the part that is throwing me off. I do not know where to start.
March 31, 2010

Math
Nevermind
March 31, 2010

Math
Find u X v, where Q is the angle between u and v. magnitude of u =4 magnitude of v=10 Q=2pi/3 The Q is the part that is throwing me off. I do not know where to start.
March 31, 2010

Math
Thank You!
March 31, 2010

Math
Three forces with magnitudes of 70 pounds, 40 pounds, and 60 pounds act on an object at angles of -30 degrees, 45 degrees, and 135 degrees, respectively, with the positive x-axis. Find the direction and manitude of the resultant of these forces. Please explain. I really do not...
March 31, 2010

pre-Cal(Please help)
Use the law of cosines to find the angle Q between the given vectors. v = 3i + j w = 2i - j
March 31, 2010

Math
Use the law of cosines to find the angle Q between the given vectors. v = 3i + j w = 2i - j
March 30, 2010

math
collected for use in the approval process required by the U.S. Food and Drug Administration (FDA). Some participants were given a placebo, an inert substance that looks like the drug; others were given the drug. The data are shown in the following table: No Help Help Drug 22 ...
March 30, 2010

math
collected for use in the approval process required by the U.S. Food and Drug Administration (FDA). Some participants were given a placebo, an inert substance that looks like the drug; others were given the drug. The data are shown in the following table: No Help Help Drug 22 ...
March 30, 2010

Math
DOes a line have one or 2 arrows?
March 30, 2010

5th grade
How do i make a frequency table?
March 30, 2010

Math(Please check)
Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
March 30, 2010

Pre-Cal
Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
March 29, 2010

Math
Nevermind
March 29, 2010

Math
Find the exact value of the trigonometric function given that sin u = 5/13 and cos = -3/5 1) sin(u-v) My teacher said to make two right triangles and then find the missing parts by the pyth theorem. For the 5/13 triangle I got 12 and the other triangle I got 4. I do not know ...
March 29, 2010

Math
Thank You
March 29, 2010

Math
Find the exact value of the trigonometric function given that sin u = 5/13 and cos = -3/5 1) sin(u-v) My teacher said to make two right triangles and then find the missing parts by the pyth theorem. For the 5/13 triangle I got 12 and the other triangle I got 4. I do not know ...
March 29, 2010

Pre-Cal(Urgent)
Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
March 29, 2010

Pre-Cal(Please help)
h(x) = 1/x-3 + 1 I know the vertical and horizontal asymptotes but I just need to know the domain. Please help. I am very confused.
March 29, 2010

Pre-Cal
Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not know how to correct ...
March 29, 2010

chemistry
The maximum concentration set by the U.S. Environmental Protection Agency for lead in drinking water is 15 ppb. What is this concentration in milligrams per liter? How many liters of water contaminated at this maximum level must you drink to consume 1.0 ug of lead?
March 28, 2010

Pre-Cal
Use the law of cosines to find the angle of Q between the given vectors. v=3i + j w=2i - j
March 28, 2010

Pre-Cal
Find the component form of v given its magnitude and the anlge it makes with the positive a-axis. v=3 v in the direction 3i + 4J Would the component form be (3,4)?
March 28, 2010

Pre-Cal
Thank You!!
March 28, 2010

Pre-Cal
Find the magnitude and direction angle of the vector v. v= 8(cos135 degrees i + sin135 degrees J) I think that the answer is v= 5 and Q = 135. Am I correct?
March 28, 2010

Pre-Cal
Find the vector v with the given magnitude and the same direction as u. Magnitude: v=3 direction: u=(4,-4) I am not sure what to do here or how to start.
March 28, 2010

Math(Correction)
There are no parentheses used in the equation. Its just 1 over x-3 and then plus 1 is on the right side.
March 27, 2010

Math
give the domain of the function and identify any vertical or horizontal asymptotes. g(x)= 1 / x-3 + 1 My answer was x = o and y=3 but this was wrong. Please explain!!
March 27, 2010

Math
What is the midrange of {6,7,8,9,10,12,15,15,20,28}
March 27, 2010

Pre-Cal
use a graphing calculator to obtain the graph of the function. What do you observe about its asymptotes? g(x) = 4 [x-2] / x + 1 My answer was there are two horizontal asymptotes. My teacher said that there are two asymptotes but she wants me to find the equation for them. I ...
March 26, 2010

Pre-Cal
use a graphing calculator to obtain the graph of the function. What do you observe about its asymptotes? g(x) = 4 [x-2] / x + 1 My answer was there are two horizontal asymptotes but it was wrong.
March 26, 2010

Pre-Cal
Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / (x - 3) + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?
March 26, 2010

Pre-Cal(Please help)
Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / x - 3 + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?
March 26, 2010

Pre-Cal
Give the domain of the function and identify any vertical or horizontal asymptotes. h(x) = 1 / x - 3 + 1 I had x = 0 and y = 3. Would the domain be all numbers except 1?
March 25, 2010

Pre-Cal
what about the domain of 1/x. Would it be 0?
March 25, 2010

Pre-Cal(Please help)
Determine the domains of (a)f and (b) f X g f(x) = 1/x g(x)= x + 3 For the domain of f I had x > 0 and for f X g I had all real numbers but this was wrong.
March 25, 2010

Pre-Cal
Determine the domains of (a)f and (b) f X g f(x) = 1/x g(x)= x + 3 For the domain of f I had x > 0 and for f X g I had all real numbers but this was wrong.
March 25, 2010

Pre-Cal
Find two functions f and g such that (f X g)(x) = h(x). (There are many correct answers.) h(x) = 4 / (5x + 2)^2 = My answers were: f(x) = 4 / 5x, and g(x) = 5x + 2 Please explain. These answers were wrong and I do not know how to fix them!!
March 25, 2010

Pre-Cal
Find (a) f X g , (b) g X f, and (c) f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For the f(x) the 3 is little above the sqrt sign. my answers were: (a) = 3sqrt x^4 -1 (b) = x^4 -1 (c) = 6sqrt x+1 These answers are wrong but I do not know how to do this
March 25, 2010

Pre-Cal(Please help)
Find two functions f and g such that (f X g)(x) = h(x). (There are many correct answers.) h(x) = 4 / (5x + 2)^2 = My answers were: f(x) = 4 / 5x, and g(x) = 5x + 2 Please explain. These answers were wrong and I do not know how to fix them!!
March 25, 2010

Pre-Cal(Please help)
Find (a) f X g , (b) g X f, and (c) f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For the f(x) the 3 is little above the sqrt sign. my answers were: (a) = 3sqrt x^4 -1 (b) = x^4 -1 (c) = 6sqrt x+1 These answers are wrong but I do not know how to do this.
March 25, 2010

Math
42/56 in simplest form
March 25, 2010

math
what is the answer to this riddle. what should you say when u meet an angel
March 24, 2010

Math
Find two functions f and g such that (f X g)(x) = h(x). ( There are many correct answers. My answers were f(x) = 4/5x and g(x) = 5x + 2 but this was wrong. I do not know how to do this.
March 23, 2010

Math(Please help)
Find two functions f and g such that (f X g)(x) = h(x). ( There are many correct answers. My answers were f(x) = 4/5x and g(x) = 5x + 2 but this was wrong.
March 23, 2010

Math
Find two functions f and g such that (f X g)(x) = h(x). ( There are many correct answers. My answers were f(x) = 4/5x and g(x) = 5x + 2 but this was wrong.
March 23, 2010

Pre-Cal(please check)
I have to find the width of a river which is represented by a right trianle. The opposite side is labeled w and the adjacent side is 1oo ft. Theta is 54 degrees. Would my equation be opp = adjacent/cos(54)?
March 23, 2010

Math
NEVER MIND!!!!!!!
March 23, 2010

Math
Nick has done 35% of his homework. He had been working for 28 minutes. How long will it take him to finish his homework?
March 23, 2010

Math
solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.
March 23, 2010

Pre-Cal(Please help)
solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.
March 23, 2010

Pre-Cal
solve for r There is a right triangle with the hypotenuse as r , the angle as 45 degrees and opposite side as 20. I am having a hard time finding this out. I had tan 45 = 1.61 20(1.61) = 32.4 but this is wrong.
March 23, 2010

Pre-Cal
What is the domain of f/g? f(x) = x / x+1 g(x) = x^3 Please explain! Thank you
March 22, 2010

sociology
what is your experience with bureaucracy or a corporation. Say if it was a good or bad experience for you and why??
March 22, 2010

algebra
i meant james im sorry.. but i solved the problem on my own thank u tho
March 22, 2010

algebra
James invested some money at 12% interest. James also invested $188 more than 4 times that amount at 13%. How much is invested at each rate if Sang receives $2249.57 in interest after one year?
March 22, 2010

Math
Identify n(S) for the given set. S = {f, h,m, r} A) 4 B) 0 C) Infinite D) 3 is the answer c, since the given set can have a unlimted number of elements. or is it b, since the letters are not in order?
March 21, 2010

Math
Identify n(S) for the given set. S = {f, h,m, r} A) 4 B) 0 C) Infinite D) 3 is the answer c, since the given set can have a unlimted number of elements. or is it b, since the letters are not in order?
March 21, 2010

Math
Find two functions f and g such that (f x g)(x) = h(x). h(x) = 4 / (5x+2)^2
March 21, 2010

Math
2) Find f x g, g x f, and f x f f(x) = 3sqrt x-1 g(x) = x^3+1 For the f(x) the 3 is little above the sqrt sign. I do not understand how do find these.
March 21, 2010

Math
1)What is the domain of f/g? f(x) = x/x+1, g(x) = x^3 all real numbers greater than 1. Am I correct? 2) Find f x g, g x f, and f x f f(x) = 3sqrt x-1 g(x) = x^3+1 For the f(x) the 3 is little above the sqrt sign. I do not understand how do fidn these.
March 20, 2010

Help!!!
sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?
March 19, 2010

Math(Urgent!!!)
sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?
March 19, 2010

Math
solve for x: log4 X - log4 2 = 2 log(2x) = 2 Now what do I do?
March 19, 2010

Math
sin x / 1-cosx is equivalent to: sin x / 1 + cos x Is this right?
March 19, 2010

Math
Find the exact values of the vertical asymptotes for o is less than or equal to Q is less than or equal to pi for the function y= cot(3Q) I need to show my work for this one but I do not know how to do this.
March 19, 2010

Math(Check)
Given that tan(Q) = -3/4 and Q is in the second quadrant tell the value of the cosQ cos=-4/5 Correct?
March 19, 2010

math (check)
in which one quadrant is the cosecant negative and the secant positive. Quadrant 4. Is this correct?
March 19, 2010

Math(Please Check)
in which one quadrant is the cosecant negative and the secant positive. Quadrant 4. Is this correct?
March 19, 2010

Math(Urgent)
Find the exact values of the vertical asymptotes for o is less than or equal to Q is less than or equal to pi for the function y= cot(3Q) I need to show my work for this one but I do not know how to do this.
March 19, 2010

Math(Please check)
solve for x: log4 X - log4 2 = 2 log(2x) = 2 Now what do I do?
March 19, 2010

Math
use the sum and difference identities to find the cosine angle cos pi/9 cos pi/3 - sin pi/9 sin pi/3 I do not know how to solve this because pi/9 is not on the unit circle.
March 17, 2010

Pre-Cal(Please check)
1)f(x) = -x + sqrt 4 - x^2 Find f(-2) -(-2) + sqrt 4 - (-2)^2 = 2 + sqrt 4 + 4 2 + sqrt 8 = 4.828 Is this correct?
March 16, 2010

Pre-Cal
1)find f(g(x)) f(x) = x^2 + 2x g(x) = 1/x x^3 + 2x Is this correct? 2) solve: 3^x-1 = 10 ln 3/ ln 10 = .264 Is this correct? I am not sure how to do these. 3) Solve: 3^x+2 - 4 = 12
March 15, 2010

Pre-Cal(Please help)
1)(1-cos^2x)(csc x) ? Is this equal to sec x? 2) Expand: log7 3 sqrt x / x^2y 3) Find and simplify: f(g) F(x) = x^2 + 2x g(x) = 2x x^2 + 2x(2x) = x^2 + 4x Is this correct?
March 15, 2010

language arts
Fill in the blank: The president will _______ well- deserved honors on the retiring ambassador.
March 15, 2010

Pre-Cal
1)(1-cos^2x)(csc x) ? Is this equal to sec x? 2) Expand: log7 3 sqrt x / x^2y 3) Find and simplify: f(g) F(x) = x^2 + 2x g(x) = 2x x^2 + 2x(2x) = x^2 + 4x Is this correct?
March 15, 2010

math
Expand: log7= 3sqrtx / x^2y
March 14, 2010

Math
Expand: log7= 3sqrtx / x^2y
March 14, 2010

Math(Please help)
Solve log3 x + log3 8 = 4
March 14, 2010

Math
Solve log3 x + log3 8 = 4
March 14, 2010

Scince
What is hidrogen?
March 11, 2010

Pre-Cal
Find cos(2x) if sin = 7/25 and x lies in quadrant 1 My answer was 336/625 but this was wrong. I do not know how to figure this out.
March 11, 2010

Pre-Cal
1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct? 2) Complete the identity tan^2Q - 3sinQtanQsecQ = -2tan^2Q Correct?
March 10, 2010

Math(Please help)
1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct? 2) Complete the identity tan^2Q - 3sinQtanQsecQ = -2tan^2Q Correct?
March 10, 2010

Math(Please help)
1)tan 5 degrees + tan 25 degrees / 1 tan 5 degrees tan 25 degrees = sqrt 3 / 3 Am I correct? 2) Complete the identity tan^2Q - 3sinQtanQsecQ = -2tan^2Q Correct?
March 10, 2010

Psychology
he has a very strong id and a weak super ego
March 8, 2010

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