Tuesday
March 31, 2015

Posts by dEE


Total # Posts: 782

college Algebra
Use a calculator to help solve the problem. The life expectancy of white females can be estimated by using the function = 78.5(1.001)x, where x is the current age. Find the life expectancy of a white female who is currently 50 years old. Give the answer to the nearest tenth. L...
November 4, 2013

college algebra
i did that and it is not working. i get 0.0348
November 4, 2013

college algebra
Use a calculator to help solve the problem. The intensity I of light (in lumens) at a distance x meters below the surface is given by I = I0 k x, where I0 is the intensity at the surface and k depends on the clarity of the water. At one location in the Atlantic ...
November 4, 2013

College Algebra
thank you Reiny and Bob
November 4, 2013

College Algebra
Use a calculator to help solve the problem. One isotope of holmium, 162Ho, has a half life of 22 minutes. The half-life of a second isotope, 164Ho, is 37 minutes. Starting with a sample containing equal amounts, find the ratio of the amounts of 162Ho to 164Ho after two hours...
November 4, 2013

Finance
P5. A thirty U.S. Treasury bond has a 4.0 percent interest rate. In contrast, a ten-year Treasury bond has an interest rate of 2.5 percent. A maturity risk premium is estimated to be .2 percentage points for the longer maturity bond. Investors expect inflation to average 1.5 ...
November 2, 2013

Statistics Math
with the reliability coefficent of 0.81 using the classical theory we would interpret that the
October 28, 2013

College Algebra
I think the question is asking what she would pay at the end of the year. I tried $159.93 and it was not correct.
October 28, 2013

College Algebra
A bank credit card charges interest at the rate of 23% per year, compounded monthly. If a senior in college charges $1,700 to pay for college expenses, and intends to pay it in one year, what will she have to pay?
October 28, 2013

math
if a 50ft flag pole cast a 10ft shadow how far is it from the end of the shadow to the top of the pole
October 25, 2013

college algebra
graph the following: 7x + 6y = 42 (-6x+42)\(7)
October 24, 2013

college algebra
graph the following: (5/4)x-4 (4x+16)/(5)
October 24, 2013

college algebra
Thanks, I finally got it.
October 21, 2013

college algebra
now all I need help on is finding the domain of the f(f) that you just posted.
October 21, 2013

college algebra
no sir, it asks for f(f).
October 21, 2013

college algebra
thank you so much steve!! could you help me with this one? Let f(x) = square root (x + 2) and g(x) = x^2 − 2. Determine the domain of the composite function. (Enter your answer using interval notation.) f compose f _____? and Find the composite function. (f compose f)(x...
October 21, 2013

college algebra
find the domain of (x-2)/(-3x+7)
October 21, 2013

college algebra
Let f(x) = 1/x − 2 and g(x) = 1/x − 3 . Determine the domain of the composite function. (Enter your answer using interval notation.) g compose f _____? & Find the composite function. (g compose f)(x) = _____?
October 21, 2013

college algebra
Let f(x) = square root (x + 2) and g(x) = x^2 − 2. Determine the domain of the composite function. (Enter your answer using interval notation.) f compose f ______? & Find the composite function. (f compose f)(x) = _____?
October 21, 2013

college algebra
(Enter your answer using interval notation.) f compose f
October 21, 2013

college algebra
Let f(x) = x + 2 and g(x) = x2 − 2. Determine the domain of the composite function.
October 21, 2013

college algebra
Thank you so much.
October 21, 2013

college algebra
what is the domain of (square root of x) +7?
October 21, 2013

college algebra
Thank you Steve, that was a big help.
October 14, 2013

college algebra
the following rational function gives the number of days it would take two construction crews, working together, to frame a house that crew 1 (working alone)could complete in t days and crew 2 (working alone) could complete in t+3 days. f(t)=(t^2+3t)/(2t+3). (a) if crew 1 ...
October 14, 2013

college algebra
Need help in finding all vertical, horizontal, and slant asymptotes, x- and y-intercepts, and symmetries of f(x)=(x-3)/(x-4)
October 9, 2013

Chemistry
What is the relationship of the concentration of H3O and of OH
October 9, 2013

social studies
men from higher social classes in------ cultures tend to have low levels of conformity, more self-direction, and have greater intellectual flexibility than did men from lower social classes A) collectivist B) individualist C) interdependent D) all My choice is C but Im a ...
October 4, 2013

physics
a 100g mass of cookie dough hits inelastically with a 300g mass of cookie dough and they stick. the 100 g mass was moving to the right at 40 m/s and the 300g mas was moving to the left at 5 m/s. what is the final velocity of the massive cookie dough ball? what fraction of ...
October 3, 2013

social studies
thank you very much!
September 29, 2013

social studies
I am guessing this one, because I can't find the answer on my book. Would it be D.
September 29, 2013

social studies
people in countries with tend to be happier A) high incomes B) low incomes C) more civil liberties D) high incomes and more civil liberties My answer is B.
September 29, 2013

social studies
daydreaming can be an expression of: A) repression B) denial C) sublimation D) projection My answer is D
September 29, 2013

social studies
thank you for the eye opener:)
September 29, 2013

social studies
then the answer is B, because personality its not heritable and def. not C
September 29, 2013

social studies
all personality variables are: A) highly heritable B) unconscious C) theoretical constructs D) easily assessed with questionnaries My asnwer is D
September 29, 2013

aed
thank you
September 20, 2013

aed
I need an answer
September 20, 2013

aed
determine the potential impact of socioeconomic status on education in the following areas: teacher expectatations, student tracking, equal representation in the curriculum, and financial support for schools
September 20, 2013

math
a rectangular swimming pool 20 feet long and 10 feet wide,is enclosed by a wooden deck that is 3 feet wide. What is the area of the deck? How much fence is required to enclose the deck?
September 19, 2013

math
a rectangular swimming pool 20 feet long and 10 feet wide,is enclosed by a wooden deck that is 3 feet wide. What is the area of the deck? How much fence is required to enclose the deck?
September 19, 2013

Algebra
Express the relationship 20 < C < 30 in terms of F, where F = 9/5C + 32. _____________ < F < _____________
September 17, 2013

Algebra
the cost of renting a rototiller is $16.50 for the first hour and $10.95 for each additional hour. How long can a person have the rototiller if the cost must be less than $55.00?
September 17, 2013

algebra
a student write that an=3n+1 is a explicit formula for the sequence 1,4,7,10.explain the error and write the correct explicit formula for the sequence.
September 11, 2013

college algebra
The county news earns a profit of $20 per year for each of its 3000 subscribers. Management projects that the profit per subscriber would increase by $0.01 for each additional subscriber over the current 3,000. How many subscribers are needed to bring a total profit of $113,100?
September 10, 2013

college algebra
no, I copied the question just as it is, there is 2 answers, the $10,000 is the smaller amount he invested, there should also be a larger amount.
September 10, 2013

college algebra
Scott and Laura have both invested some money. Scott invested $2500 more than Laura and at a 3% higher interest rate. If Scott received $900 annual interest and Laura received $450, how much did Scott invest?
September 10, 2013

college algebra
a large rectangular movie screen in an IMAX theater has an area of 8624 square feet. Find the dimensions of the screen if it is 10 feet longer than it is wide.
September 8, 2013

CHEM
joules to melt a 525g ice cube at 0∘C and to warm the liquid
September 8, 2013

Algebra
Kevin stuffs shrimp in his job as a seafood chef. He can stuff 1200 shrimp in 4 hours. When his sister helps him, they can stuff 1200 shrimp in 3 hours. If kevin gets sick, how long will it take his sister to stuff 600 shrimp?
September 5, 2013

Algebra
Allison drove home at 68 mph but her brother who left at the same time could only drive at 54 mph. When Allison arived, her brother still had 84 miles to go. How far did Allison drive?
September 5, 2013

business
would it B be the best answer?
August 27, 2013

business
Select the statement which reflects the employer position on electric monitoring. a.) An employee's actions during work time are at the discretion of the Company. b.) Employees should be notified of any electronic monitoring and its purpose. c.)Electronic monitoring ...
August 27, 2013

business
A manager refuses to reveal company secrets despite an offer of handsome kickbacks. Which of the following reasons justifies her action if she were to subscribe to Kohlberg’s preconventional level of moral reasoning? A- An idea of the unpleasant emotions she would feel if...
August 27, 2013

Physics
a cylinder of gas is at a room temp (20 c) the air conditioner breaks down and the tempture rises to 58c what is the new pressure of the gas relative to its initial pressure?
July 30, 2013

maths
find a single discount equivalent to the discount series 20%, 10%, and 15%.
June 29, 2013

Stats
1. In a study of caffeine and stress, college students indicate how many cups of coffee they drink per day and their stress level on a scale of 1-10. The data appear below. Number of Cups of Coffee Stress Level 3 5 2 3 4 3 6 9 5 4 1 2 7 10 3 5 = 3.88 X= 5.13 s = 2.03 s = 2.90 ...
June 22, 2013

Eng
wrong
June 9, 2013

math
a rectangle has a length of 10 3/16 inches and a width of 6 7/8 inches. nwhat is the perimeter of the rectangle
May 29, 2013

algebra
Need help with 3 problems on page 167 X+2y=6 5x+3y=2 4x-3y=-20 -x-8y=5 5x+6y=-11 3x+y=-4
May 14, 2013

Geometry
A landowner digs a 15 meter deep well with a diameter of 2.8 meters. The landowner spreads the dirt dug out of the holds to form a flat platform 31.5 meters by 6 meters. What is the length of the platform?
May 1, 2013

Geometry
An unsharpened pencil is in the shape of a hexagonal prism, in which the face edge is 4 millimeters and the length is 170 millimeters. What is the lateral area of the pencil?
May 1, 2013

Chemistry
Use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 °C and standard conditions. I absolutely have no idea what to do, please help me!
April 30, 2013

Chemistry
Oh I see what I did wrong! Thanks!
April 30, 2013

Chemistry
i got -1,279.89 and still got it wrong..doing the same calculations just fixing the 468.25 where it belongs
April 30, 2013

Chemistry
For a particular reaction at 195.1 °C, ΔG = -1488.09 kJ/mol, and ΔS = 288.67 J/(mol·K).? Calculate ΔG for this reaction at -20.0 °C. delta G = delta H - (T*delta S) -1488.09 kJ/mol = (delta H) - ((461.8K)*(+288.67 J/(mol x K))*(1 kJ/1000 J)) -1488...
April 30, 2013

geometry
Find the weight to the nearest kg, of the cement block. Cement weighs 1700 kg/m3. 12cm x 10cm and 40cm x 20 cm x 20cm.
April 20, 2013

statistics
It takes approximately 15 minutes to code one record. How many personnel hours would be needed to code 1,424 discharges for the month?
April 15, 2013

Chemistry
So i got Ka = X^2/(0.184-x) not sure what to do next.
April 11, 2013

Chemistry
The Ka of a monoprotic weak acid is 4.47 × 10-3. What is the percent ionization of a 0.184 M solution of this acid?
April 11, 2013

physics
A solid steel cylinder is standing (on one of its ends) vertically on the floor. The length of the cylinder is 3.4 m and its radius is 58 cm. When an object is placed on top of the cylinder, the cylinder compresses by an amount of 5.9 10-7 m. What is the weight of the object?
April 3, 2013

physics
A copper cube, 0.31 m on a side, is subjected to two shearing forces, each which has a magnitude F = 6.40 106 N (see the drawing). Find the angle θ (in degrees), which is one measure of how the shape of the block has been altered by shear deformation.
April 3, 2013

Cal
Find the critical number of the function. g(t) = | 4t - 9 |
April 3, 2013

Chemistry
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. The balanced chemical equation is N2+O2<--->2NO. If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after ...
April 2, 2013

Chemistry
If a 4.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? A(aq) --><--- 2B(aq) Kc=8.54 x 10^-6 at 500K ---><--- = equilibrium
April 2, 2013

Chemistry
At a certain temperature, the Kp for the decomposition of H2S is 0.755 H2S (g) <-- --> H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.201 atm in a closed container. what is the total pressure in the container at equilibrium?
April 2, 2013

Chemistry
Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) ⇌ PCl3(g) + Cl2(g) A 0.304 mol sample of PCl5(g) is injected into an empty 4.75 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.
April 2, 2013

Chemistry
At a certain temperature, the equilibrium constant for the following chemical equation is 2.00. At this temperature, calculate the number of moles of NO2(g) that must be added to 2.64 mol of SO2(g) in order to form 1.10 mol of SO3(g) at equilibrium. SO2(g) + NO2(g) <--->...
April 2, 2013

Physics
The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the drawing, find (a) the x coordinate and (b) the y coordinate of the center of...
April 1, 2013

Cal
lim_(x->0^+)(tan(9x))^x
March 27, 2013

chemistry
How many grams are in 4.00mol of sodium chloride (\rm NaCl)
March 24, 2013

Science
How does the number of neutrons in a stable nucleus compare with the number of protons?
March 22, 2013

Science
If the half-life of a radionuclide is 1 month, is a sample of it completely decayed after 2 months?
March 22, 2013

physical science
What physical quantities are governed by the quantum numbers of an atomic electron?.
March 22, 2013

Physics
A half-atwood machine is constructed, as shown in the drawing below. The table is NOT frictionless, M1 is 50 grams, and M2 is 30 grams. Mass M2 descends 32 cm in 18 seconds. Find the tension in the wire.
March 21, 2013

phical science
Photons and neutrinos have neither charge nor mass. What are the differences between them?
March 18, 2013

Cal
Differentiate the function. f(x) = sin(x) ln(2x)
March 14, 2013

math
nevermind, all figured out. thanks!
March 11, 2013

math
oops, yes carrot cakes...typed too fast. still dont understand, can you explain it better for me please?
March 11, 2013

math
castor brought 6 3/4 carat cakes to share with 26 students. did castor bring enough for each student to have 1/4 of cake?
March 11, 2013

Cal 1
Use Newton's method with the specified initial approximation x1 to find x3, the third approximation to the root of the given equation. (Round your answer to four decimal places.) 1/3x^3 + 1/2x^2 + 1 = 0, x_1 = −3
March 7, 2013

Cal 1
Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answer to two decimal places.) tan x ≈ x
March 7, 2013

Cal 1
Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) (1 + 2x)^1/4 ≈ 1 + 1/2x
March 7, 2013

Cal 1
Find the linearization L(x) of the function at a. f(x) = x^4/5, a = 32
March 7, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

Physics
A pole-vaulter just clears the bar at 5.34 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3.8E3 J. What is his weight?
March 6, 2013

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