Wednesday

March 4, 2015

March 4, 2015

Total # Posts: 995

**Math**

Solve the proportion: x/20 = 5/8
*November 13, 2013*

**chemistry**

given 10.8 grams of substance y,if the substance absorbs 231 kilojoules of energy and the specfic heat of substance is 6.55 J/g*0C what is the heat change
*November 7, 2013*

**math**

the total capacity of 1 carton is the same as the total capacity of 2 identical cups. If 1.8 liters of water are needed to fill up 3 identical cups and 2 identical cartons, what is the capacity of a cup? express your answer correct to 2 decimal places
*October 17, 2013*

**Physics**

A person pushes on a 56-kg refrigerator with a horizontal force of -251 N; the minus sign indicates that the force points in the −x direction. The coefficient of static friction is 0.7. (a) If the refrigerator does not move, what are the magnitude and direction of the ...
*October 2, 2013*

**Physics 2**

A 3.0-g string, 0.14 m long, is under tension. The string produces a 200-Hz tone when it vibrates in the third harmonic. The speed of sound in air is 344 m/s. Find the tension in the string.
*September 29, 2013*

**math**

Lisa runs 6 miles in 55 minutes, at the same rate, how many miles would she have ran in 44 minutes?
*September 16, 2013*

**Physics**

Suppose that the gravitational acceleration on a certain planet is only 3.1 m/s2. A space explorer standing on this planet throws a ball straight upward with an initial velocity of 35 m/s a) What is the velocity of the ball 4 seconds after it is thrown? m/s (b) How much time ...
*September 7, 2013*

**child day care**

first founded as a parent cooperative, is/are one of the best examples of successful early childhood school-family partnership.
*August 22, 2013*

**world history**

identify and describe two ways in which American federalism has changed since the ratification of the constitution
*August 7, 2013*

**Math**

-7(2a2-4) Multiply
*August 4, 2013*

**MATH**

but when h is 0 t=0....
*July 19, 2013*

**MATH**

Given that logbase2 a+logbase2 b=3 , calculate all the possible integer values of a if b is also an integer value. Explain your reasoning.
*July 15, 2013*

**MATH**

Given that x=logbase3 5 and y=logbase3 2 , rewrite logbase3 60 in terms of x and y.
*July 15, 2013*

**algebra**

change pints to gallons. 1 1/2 pints = 3/16 gallon 3/16 x _____ = ____ create proportion. 6^3 24^3 6^3 * x = 24^3 * 3/16 216 * x = 13824 * 3/16 simplify 216 * x = 2592 divide both sides by 216 x = 12 gallons
*June 17, 2013*

**Physics**

A car is stopped at a traffic light. When the light turns green, the driver accelerates so that the car is going 10 m/s after 5s. What is the car’s average acceleration?
*June 3, 2013*

**Aviation**

Does the engine of a Cessna 162 have an alternate air source? How many fuel pumps does the Cessna 162 have? Your help is very much appreciated!
*May 31, 2013*

**ashford university**

Use two commas around “extra information” in a sentence to show that it is not important to the meaning of that sentence if taken out. For example: “The hardware store down the street, which had been paved recently, is open until midnight five days a week.”
*May 17, 2013*

**HCS/212**

7. Have you personally or professionally noticed any changes in the way health care information or services are researched or accessed? Explain your response. 8. Are you finding that there is an increase or a decrease in options for finding or researching information about ...
*April 28, 2013*

**algebra**

Complete the following word problems. 14.It takes 9 hours for Isabella to rake leaves by herself,but her brother Matthew can work three times as fast.If they work together, how long will it take them to rake leaves? Rate Time Work Done Isabella Matthew
*April 24, 2013*

**Chemistry**

What are the healthcare applications of biochemical, pharmaceutical and diagnostic chemical reactions?
*April 18, 2013*

**Calculus 3**

wow thank you! How did you find the limits for x and y?
*April 5, 2013*

**Calculus 3**

Let G be the region in the first octant that is inside both the cylinders x^2+y^2=1 and y^2+z^2=1. Use a triple integral to evaluate the volume of G.
*April 5, 2013*

**Calculus 3**

The following parametric equations describe a portion of a shperical surface: x=4cosusinv y=4sinusinv z=4cosv where 0<=u<=pi/4 and 0<=v<=pi/2 Find the surface area of this portion of the sphere.
*March 30, 2013*

**c-justice 200**

Should judicial review be eliminated? Provide a detailed explanation for your answer. b) If judicial review were eliminated, what alternative means could be used to interpret the meaning of the Constitution?
*March 27, 2013*

**c-justice 200**

Should judicial review be eliminated? Provide a detailed explanation for your answer. b) If judicial review were eliminated, what alternative means could be used to interpret the meaning of the Constitution?
*March 26, 2013*

**Calculus 2**

Find the arclength of y=x^3/3+1/(4x) from 1 to 2. I know that arclength is the integral from 1 to 2 of the sqrt of (1 + (y')^2)dx, but have not been able to figure out how to evaluate the integral. Your help is much appreciated!
*March 24, 2013*

**math**

monica spent 8/13 hours listening to tapes of beethoven and brahms. she spent 2/5 hours listening to beethoven. how many hours were spent listenign to brahms
*March 24, 2013*

**Physics**

A man seeking to set a world record wants to tow a 122000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 95 kg, and the coefficient of static friction between his shoes and the runway is 0.74. What is the greatest...
*March 20, 2013*

**Physics**

A rescue helicopter is lifting a man (weight = 797 N) from a capsized boat by means of a cable and harness. (a) What is the tension in the cable when the man is given an initial upward acceleration of 0.711 m/s2? (b) What is the tension during the remainder of the rescue when ...
*March 20, 2013*

**Trig**

What is the exact value of tan(s+t) if sin(s+t)=56/65. And cos(s)=5/13 and sin(t)=4/5. Everything is in the first quadrant
*March 19, 2013*

**calculus 1**

A kite 100 ft above the ground moves horizontally at a speed of 10 ft/s. At what rate is the angle (in radians) between the string and the horizontal decreasing when 200 ft of string have been let out?
*February 26, 2013*

**math**

Find the density of an object which has a mass of 360 grams and fills a volume of 36 mL.
*February 19, 2013*

**calculus**

A batter hits a ball 3 feet from home plate along the path x=69t, y=3+40t-16t^2. How long is the ball in flight and how far does it travel?
*February 9, 2013*

**math**

Find an equation of the line that passes through the point and has the indicated slope m. (23, 5); m = -2 y=?
*February 6, 2013*

**spanish 102**

I only have the last 3: ¿Te cepillaste los dientes después de comer? Sí, me cepillé los dientes después de comer. ¿Se maquilla Julia antes de salir a bailar? Sí, Julia se maquilla antes de salir a bailar. ¿Se duchan ...
*February 3, 2013*

**math**

which is a better buy an square pizza that is 8"x8" and cost $10 or a round pizza that is 9" in diameter for the same price?
*February 1, 2013*

**english**

One of the following sentences contains an independent clause and a dependent clause, which makes it a complex sentence. Which is the complex sentence? A. I hesitated a moment, but her smile gave me courage. B. I came home; I saw an envelope in the mailbox. C. Jenny was the ...
*January 30, 2013*

**english**

One of the following sentences contains an independent clause and a dependent clause, which makes it a complex sentence. Which is the complex sentence? A. I hesitated a moment, but her smile gave me courage. B. I came home; I saw an envelope in the mailbox. C. Jenny was the ...
*January 30, 2013*

**Physics 1**

A ball starts from rest and rolls down a hill with uniform acceleration, traveling 150 m during the second 5.0 s of its motion. How far did it roll during the first 5.0 s of motion?
*January 24, 2013*

**Calculus 3**

Find the equation of the plane that passes through (1,0,0) and is perpendicular to the line r=<1,0,2>+t<1,0,1>. The vector equation of a plane is n*(r-rsub0)=0. Thank you so much for your help!
*January 24, 2013*

**Anatomy and physiology**

1)Why is enzymatic catalysis essential for life? Describe in detail the mechanism for enzyme mediated anabolic and catabolic reactions. What are the various modes of inhibition. 2) "every energy transfer increases the entropy of the system" .why? (hint- law of ...
*January 21, 2013*

**math**

If the first marble is replaced before the second marble is drawn, what is the probability of selecting a white marble then a red marble? there are 4 red marbles 5 white and 3 blue
*January 18, 2013*

**Calculus 3**

Let L be the line that passes through the points (0,1,6) and (0,3,2). Find the length of the projection of k=<0,0,1> on the line L. I know how to do this if one part of the vector k is touching the line, but unless i'm mistaken, that is not the case in this question...
*January 16, 2013*

**Calculus 3**

Let L be the line that passes through the points (0,1,6) and (0,3,2). Find the length of the projection of k=<0,0,1> on the line L. I know how to do this if one part of the vector k is touching the line, but unless i'm mistaken, that is not the case in this question...
*January 16, 2013*

**Calculus 3**

i'm confused on how you got u=(1,1) and v=(1,sqrt2). Shouldn't they each have 3 coordinates? u=<0,1,1> and v=<1,sqrt2,0> ???
*January 16, 2013*

**Calculus 3**

Let u=j+k and v=i+jsqrt2. a) Calculate the length of the projection of v in the u direction. b) Calculate the cosine of the angle between u and v. Your help is very much appreciated!
*January 16, 2013*

**math**

solve the following exponential equation e^x-4=-e^-x when I work i get x-In(u) is this correct
*January 9, 2013*

**calculus**

use the properties of logarithms to condense the logarithmic expression. write the expression as a single logarithms whose coeffient is 1. Inx+In5=? Can you show work
*January 7, 2013*

**calculus**

I am sorry. This is the equation. Solve the follow exponential equation e^x+e^-x=6
*January 6, 2013*

**calculus**

solve the inequality e^x+e^x-x=6 can you show work
*January 6, 2013*

**calculus**

should I go farther or is that it. I don't know it that it the final answer--I think that is what is bothering me?
*January 4, 2013*

**calculus**

solve the logarithmic equation. Be sure to reject any value of x that is not in the domain of the orginal logarithmic expression. In square root x+7=1 I get this far and then get stuck, can you help me? In square root x+7=1 e=square root x+7 e^2=x+7 x+7=e^2 x=e^2-7
*January 4, 2013*

**math**

chane the logarithmic expression to an equivalent expression involving an exponent log416=x **the 4 is supposed to be dropedd down lower by the g.**
*January 3, 2013*

**math**

find the inverse of the following function. find the domain, range and asymptotes of each. f(x)=In(x+1)+1 please show work.
*January 2, 2013*

**math**

Yes, Reiny you caught the typo It should read f(x)=x^2+2x-8, thank you for catching that. So, now my answers will change that Riana gave. Right?
*January 1, 2013*

**math**

answer the following for the given quadratic function. f(x)=x^2+x^2-8 a. what is the vertex (h,k) of f? (h,k)=? simplify your answer and type the answer in an ordered pair b. what is the axis of symmetry?
*January 1, 2013*

**math**

x+6=> if -5 less or equal to x < 1 9=> if x=1 -x+5=> if x>1 Sorry, still learing exactly how to post questions with the right signs the right way.
*January 1, 2013*

**math**

the function f is defined as the follows f(x)={x+6 if -5 less than or equal to x < 1 {9 if x = 1 {-x+5 if x > 1 a. find the domain of the function f is? b. locate any intercepts; if any please show work
*January 1, 2013*

**calculus**

solve the following inequality 15x-16 less than or equal to 15/x is the point x=0 included in the solution set of the inquality? are the other finite pointsa of the interval included in the solution set? what is the solution set? please show work
*December 27, 2012*

**calculus**

find the function that is finally graphed after the following transformations are applied to y=square root x in the order listed. a. reflected about the x-axis b. shift up 7 units c. shift right 5 units y=? would the answer be: y=sqrt(-x-5)-7
*December 13, 2012*

**calculus**

for the function f(x)=5/x+4, find the average rate of change of f from 1 to x. please show work
*December 13, 2012*

**calculus**

graph the following function using transformations. Be sure to graph all the stages on one graph. state the domain and range. y= -3/x/+1 NOT QUITE SURE HOW TO MAKE THE STRAIGHT UP AND DOWN LINE, INSTEAD OF THIS--/.
*December 12, 2012*

**calculus--please help!!**

given the following piecewise function F(x)={x+11 for -9¡Üx<-3 2 for -3¡Üx¡Ü2 2x-6 for 2<x¡Ü5 {--this symbol is to be around all three of the lines. Find: a. the domain b. the range c. the intercepts d. if f continious on its ...
*December 10, 2012*

**calculus**

find an equation for the line with the given properties. express the equation in slope-intercept form containing the points. P=(-5,4) and Q=(-4,2) plz show work
*December 9, 2012*

**calculus**

find the distanced(p_1&P_2) between points P_1 and P_2. P_1=(4,-5) and P_2=(3,4) plz show work
*December 9, 2012*

**trigonometry**

A 100-foot vertical antenna is on the roof of a building. From a point on the ground, the angle of elevation to the top and the bottom of the antenna are 51 degrees and 37 degrees, respectively. Find the height of the building to the nearest foot. How would you solve for these?
*December 9, 2012*

**calculus-can someone please help me with this ques**

I can get part of the answer then I get stumped. find the center and radius of the circle, Write the standard form of the equation. (4,3)(1,3) to get center: (1+4/2, 3+3/2)=5/2,3 answer:5/2,3 for center radius: then i am stuck
*December 9, 2012*

**college algebra, Please help!!**

a circle has the equation x^2+y^2+6x-6y-46=0 find the center and the radius of the euation. If there are any intercepts list them.
*December 9, 2012*

**college algebra--need help please!!**

write the standard form of the equation and the general form of the equation of the circle with radius r and center (h,k) r=10; (h,k)=(8,-6)
*December 9, 2012*

**calculus**

If (a,-12) is a point on the graph of y=x^2+7x, what is a? please show work
*December 4, 2012*

**calculus**

Plot the points and determine the slope of the line containing them. (-7,-4)(8,-4)
*December 4, 2012*

**trigonometry**

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. Two motorists are driving cars on the highway, both on one side of the plane. If the angle of depression to one car is 34° and to the other is 51°, how far apart are the cars? (Round ...
*December 2, 2012*

**trigonometry**

An airplane is flying at an elevation of 5150 ft, directly above a straight highway. Two motorists are driving cars on the highway on opposite sides of the plane, and the angle of depression to one car is 35° and to the other is 55°. How far apart are the cars? (Round ...
*December 2, 2012*

**physics**

A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 600 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 4,000 rev/min. (a) Find the kinetic ...
*December 2, 2012*

**Statics**

For each of the following, state (using symbols) the null and alternative hypotheses. a. Is the mean IQ of a sample of 60 children significantly below the national average of 100? b. Is the proportion of men in the class more than that expected by chance? c. Does the mean ...
*December 2, 2012*

**Statics**

In a chocolate chip cookie investigation, you decide to compare two cookie sources. Source 1: Mom mails to you a package containing a dozen of her homemade chocolate chip cookies. Source 2: You purchase a dozen of a store brand of chocolate chip cookies at the convenience ...
*December 2, 2012*

**Statics**

You wish to test whether or not a coin is fair, so you toss it 400 times and obtain 220 heads. Test the null hypothesis that the coin is fair and balanced against the alternative that it is not fair and balanced. Use the 1% significance level. Be sure to identify the null and ...
*December 2, 2012*

**Statics**

You suspect that, on the average, professional baseball players are older than professional football players. A random sample of 30 professional baseball players has a mean age of 28.8 years (assume ó = 4). A random sample of 40 professional football players has a mean ...
*December 2, 2012*

**Statics**

An apple grower is trying to produce larger fruit by using a new fertilizer. The usual fertilizer produces fruit with a mean diameter of 8.7 cm. Two new fertilizer brands are under consideration, with the following experimental results: BRAND A: n = 10, mean = 9.5 cm, s = 4 cm...
*December 2, 2012*

**Statics**

Assume that the population is normal. A sample of size 100 is taken. The resultant sample data has a mean of 48 and a standard deviation of 15. Construct the 99% confidence interval for the population mean.
*December 2, 2012*

**Statics**

An automotive engineer wants to use 64 test runs to estimate the true mean tire stopping distance. The standard deviation is assumed to be 32 feet. What is the probability that the error of the estimate will be more than 4 feet?
*December 2, 2012*

**Statics**

17. The Student Health Service assumes, based on historical data, that the height of female students is normally distributed with a standard deviation of 3 inches. The school nurse wants to estimate the average height of this year’s entering female students by examining ...
*December 2, 2012*

**physics**

Two astronauts, each having a mass of 78.5 kg, are connected by a 10.0-m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.50 m/s. Treating the astronauts as particles, calculate each of the following...
*December 1, 2012*

**physics**

A potter's wheel having a radius 0.45 m and a moment of inertia of 14.9 kg · m2 is rotating freely at 49 rev/min. The potter can stop the wheel in 8.0 s by pressing a wet rag against the rim and exerting a radially inward force of 72 N. Find the effective ...
*December 1, 2012*

**calculus**

use the given zeros to find the remaining zeros of the function h(x)=x^4-9x^3+12x^2+138x-1360 zero:3-5i enter the remaining zeros of f please show work
*December 1, 2012*

**Statics**

In designing an experiment, a psychologist is willing to assume that the underlying distribution for the time to learn a list of words is approximately normal with a standard deviation of 40 seconds. He wants to be 95% sure that the maximum error of his estimate of the mean ...
*December 1, 2012*

**Statics**

A power company takes a random sample of its delinquent account files. For 400 accounts, the average delinquent amount was $239.30 with a standard deviation of $14.52. With 99% probability, determine the maximum error of the estimate for the mean of all the delinquent accounts.
*December 1, 2012*

**Statics**

A random sample of 100 cans of peaches has an observed mean weight of 48.5 ounces and a standard deviation of 2.4 ounces. Determine the lower limit of the 95% interval for the true mean weight. The can label says that the can weights 48 ounces. Comment on this claim.
*December 1, 2012*

**Statics**

=2.325(3.25/ square root of 100) =75.5625
*December 1, 2012*

**Statics**

A candy machine distributor collects the coins from 100 machines. The standard deviation is $3.25. With probability 98%, what is the maximum error about the true mean that will result?
*December 1, 2012*

**physics**

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 250 N applied to its edge causes the wheel to have an angular acceleration of 1.053 rad/s2. (a) What is the moment of ...
*November 30, 2012*

**Calculus 2**

Thank you soooooooo much!!!!
*November 28, 2012*

**Calculus 2**

The following function has a series of the form the sum from n=0 to infinity of c(subn)x^n. Calculate the coefficients c(subn) and express the power series in summation notation. f(x)=(pi*x)/(pi*x+1) Thank you so much for your help!!!!
*November 28, 2012*

**Calculus 2**

The function ln(x-1) can be expressed as a Taylor Series of the form sum of c(subn)(x-2)^n. Calculate the formlua for c(subn).
*November 28, 2012*

**Calculus 2**

Calculate c(sub0), c(sub1), c(sub2), c(sub3), and c(sub4) for the power series the sum from n=0 to infinity of c(subn)x^n that represents f(x)=tanx. Use the first two nonzero terms of the series to approximate the tangent of 1/4 radian. Compare your approximation with the ...
*November 28, 2012*

**college algebra, Please help!!**

change the exponential expression to an equivalent expression involving a logarithm. 1.9=a^6 a=1.1129 is this the correct logarithmic expression???
*November 27, 2012*

**college algebra, Please help!!**

find the f and g, so that fOg= H H(x)=sqrt x^2+17 please show work
*November 27, 2012*

**college algebra--need help please!!**

find the domain of the composite function fog. f(x)= 2/x-3; g(x)= 7/x please show all work.
*November 24, 2012*

**college algebra--need help please!!**

solve the following exponential equation. use exact answers only. not sure how to put it into the equation but it is 2 then 1-9x where the 1-9x is above the 2=e2x where the 2x is above the 2. Can someone tell me or explain to me how to put this equation the right way here.
*November 24, 2012*

**math**

in the number 288, explain how the value represented by the digit in the tens place is related to the value represented by the digit in the ones place.
*November 24, 2012*

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