Friday

February 12, 2016
Total # Posts: 759

**English**

Could someone explain whats the difference between these two questions? Why do you wish to study the program(s)? What influenced your decisions to apply to the program(s)?
*February 10, 2014*

**Physics**

) The energy of the first excited state of a hydrogen atom is -0.34 eV ± 0.0003 eV. What is the average lifetime of for this state?
*February 6, 2014*

**math --- pls check my work!**

these are righ!!!!!!!!!
*February 3, 2014*

**History**

1. D 2. C. 3. B 3/3 100
*January 28, 2014*

**Health**

Alright thank you
*January 27, 2014*

**Health**

Thank you so much, do you know how many milligrams would be good?
*January 27, 2014*

**Health**

If you have tiny white bumps on your lips, probably caused by frequent lip biting, how can you treat it? Please help
*January 27, 2014*

**geometry**

Quad ABCD with diagonal DB. <adc=90, <c=91, <cbd=43. segment ad=segment dc=9. Which segment is longer ab or ad and why? steve, how are you solving for <abd, what are you assuming about <abc?
*January 24, 2014*

**math**

Thank you steve, but something must be wrong with this problem. We have not learned law of cosines or law of sines yet and the correct answer is ad?? Baffled at how to get this based on what we are studying, SAS and SSS inequality theorems.
*January 24, 2014*

**math**

How are you solving for <abd. Making assumptions?
*January 24, 2014*

**math**

Quad ABCD with diagonal DB. <adc=90, <c=91, <cbd=43. segment ad=segment dc=9. Which segment is longer ab or ad and why?
*January 24, 2014*

**Science**

Which aspect of Einstein's theory of special relativity was testable? the postulates only the postulates and the predictions the predictions only none of the aspects
*January 8, 2014*

**Physics 221**

What is the magnitude and direction of the electric field at a point 0.75 m away from a point charge of +2.0 pC?
*December 31, 2013*

**Quick science question**

ya stupid !@#$%^&as
*December 16, 2013*

**Quick science question**

ya stupid !@#$%^&as
*December 16, 2013*

**MAA Global Science**

A lump of ice falls from a jet plane as it tries to land at an airport. If the ice hits the ground with a vertical speed of 85m/s, what was the height of the plane when the ice fell off.
*December 13, 2013*

**Trig**

Sum and diffence formula Finding Exact value of Tan 105-Tan 10)-15)/1+ tan(105)Tan(-15)
*December 9, 2013*

**Geometry**

Find the missing numbers for the dimensions and measures of a rectangular prism... Length ? Width 7 m Height 5 m Surface Area 214 m to the second power Volume ? Please answer the one's with a ?. Thank you.
*December 6, 2013*

**Geometry**

Let's say a company is manufacturing juice boxes that are rectangular prisms with dimensions 4 inches by 3 inches by 4 inches. The company has a warehouse whose dimensions are 40 feet by 30 feet by 20 feet. If the company makes 200,000 juice boxes, will it be able to store...
*December 5, 2013*

**math**

How do you work this word problem? The team played 125 games and lost 15 more than they won.How many did they lose
*December 2, 2013*

**Help Please!!!- Physics**

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...
*November 22, 2013*

**science**

Was that answer right
*November 18, 2013*

**math**

How many formula units of the compound are present in 5.7g of Epson salt?
*November 8, 2013*

**Health part 2**

its not c
*November 5, 2013*

**Math**

So, one of my subjects midterm I got 71% (43 out of 60). The mid-term test was worth 25%. It is my first evaluation. How do I calculate my final mark so far? :|
*October 23, 2013*

**Physics**

A juggler throws a ball straight up into the air and it takes 2.80 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.
*October 21, 2013*

**Math**

Ginny has two quarters. For every week that Ginny does all of her chores, her mother increases the amount of money Ginny has exponentially. The equation y=0.5*3^x represents the amount of money that Ginny has after x weeks of doing all of her chores. What does the term 3^x ...
*October 2, 2013*

**Algebra**

Debbie finished her algebra test early so she decided to check each of her answers. After checking her answer to question #10, she realized she made a mistake in her solution. In which step does Debbie make her mistake? Original Equation: 2 + 3y = 5(y - 2) Step One: 2 + 3y = ...
*September 25, 2013*

**History (chronological order of date)**

11,000 b.c. 540 b.c. 0 894 a.d.
*September 25, 2013*

**math**

A certain ball is dropped from an altitude of 1 meter and rebounds one-half of it's previous altitude. What is the total distance the ball has traveled when it hits the floor the 40th time?
*September 5, 2013*

**Geometry**

(5d + 5) - (d +1)
*September 4, 2013*

**Physics**

A swimmer heads directly across a river, swimming at 1.9 m/s relative to the water. She arrives at a point 50 m downstream from the point directly across the river, which is 79 m wide. (a) What is the speed of the river current? m/s (b) What is the swimmer's speed relative...
*August 1, 2013*

**Math 6th grade**

What is smart estimation to determine an estimation range.
*July 17, 2013*

**physics**

A student runs through a field 100m(E) then 200m(S) and finally 50(45 degrees S of E find his final position relative to his starting point? please explain steps Answer is 272(60 degrees S of E)
*July 4, 2013*

**Physics**

Jim is 100m(S) of Paul. Paul begins to walk east at 2.0m/s the same time Jim begins to walk west at 3.0m/s. what is the displacement of Jim from Paul 20 seconds later? Please explain steps Answer is 141(SW)
*July 4, 2013*

**physics**

A jet starting from rest reaches a speed of 241km/h on 96.0m of runway. Determine the magnitude of the Jet's acceleration? Answer is 23.3m/s^2
*July 3, 2013*

**Physics**

I have no clue to this question which is why i needed the help :(
*June 10, 2013*

**Physics**

What value of voltage will be reached across the plates of a capacitor, after two time constants, if the maximum value of voltage when fully charged, reaches 200 volts?
*June 10, 2013*

**Math help!**

A bag contains 9 blue marbles and 1 green marble. What is the probability of drawing a blue marble followed by a green marble, without replacing the first marble before drawing the second marble? Is the answer 1/9?
*May 30, 2013*

**Math**

I forgot to mention the die has 6 sides.
*May 30, 2013*

**Physics**

Find the scalar product of the vectors ai+bj and bi-aj . Where a and b are arbitrary constants. What's the angle between the two vectors?
*May 30, 2013*

**Physics**

1/2mv^2(final)-1/2mv^2(initial) 2600J
*May 30, 2013*

**Physics**

1/2mv^2=1/2mv^2 v(subcompact)= 116.0762 km/h
*May 30, 2013*

**Physics**

Cannot answer need more information.
*May 30, 2013*

**Physics**

.75 Joules
*May 30, 2013*

**math**

2 51 45 58 41 44 37 38 40 44 45 40 59 45 44 34 44 43 48 32 38 1.Determine the mean of the data 2.Determine the standard deviation of the data
*May 19, 2013*

**IIT-JEE**

i have to prepare for my IIT-JEE examination. But i have no knowledge about the books for preparation. Please tell me some books for the preparation of objectives for IIT-JEE. Now i am in 10+2 class.
*May 7, 2013*

**physics**

v(b)=2m/s V(w)=1m/s Velocity of boat w.r.t water= V(bw)=v(b)-v(w) =(2-1)m/s =1m/s Time= 3min =180s Distance= v(bw)*time = 1m/s*180s = 180m.
*May 7, 2013*

**Physics**

its (c)-inertia
*May 7, 2013*

**english**

where did the story October sky take place
*April 29, 2013*

**math**

Using the method of completin the square solve x2-27x+50
*April 24, 2013*

**English **

what does he makes his life seems like "poor me" and he is elevated the process of suffering to a level that any martyr would admire means??
*April 17, 2013*

**Applied Calculus**

The world population at the beginning of 1990 was 5.3 billion. Assume that the population continues to grow at the rate of approximately 2%/year and find the function Q(t) that expresses the world population (in billions) as a function of time t (in years), with t = 0 ...
*April 14, 2013*

**Applied Calculus**

Thanks to both of you, I won't forget how to do this next time! It makes much more sense now, and will be even easier on basic functions versus logarithmic/exponential functions. I think it was the natural log that tripped me a little bit there, but thank you for the ...
*April 12, 2013*

**Applied Calculus**

I am sorry, the function is g(x)= x/(ln(x))
*April 12, 2013*

**Applied Calculus**

Find the absolute extrema of the function on the interval [2,3]. (Round your answers to the nearest hundredth.) Absolute Minimum ___ at x=___ Absolute Maximum ___ at x=___
*April 12, 2013*

**Algebra(1st one was typo)**

The function f(x)=x^3 +1/4 x −1^4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f^−1 (x) ?
*April 11, 2013*

**Algebra**

The function f(x)=x 3 +1 4 x−1 4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f −1 (x) ?
*April 11, 2013*

**Geometry**

Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...
*April 11, 2013*

**Geometry**

ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?
*April 8, 2013*

**Trig**

Use trigonometric identities to solve tan(2θ)+tan(θ)=0 exactly for 0≤θ≤π. If there is more than one answer, enter your answers as a comma separated list
*April 7, 2013*

**math**

Yes thanks
*April 6, 2013*

**math**

Yes I don't know that pattern either
*April 6, 2013*

**math**

6_12_9_18_15 Please help find the next three patterns 2_9_16_23
*April 6, 2013*

**Geometry**

ABCD is a parallelogram. If ÚABC=35 degrees , what is the measure (in degrees) of ÚADC ?
*April 5, 2013*

**Geometry**

Sorry made a mistake you are right
*April 5, 2013*

**Geometry**

Actually not because the problem is asking for 3 digits such as 100
*April 5, 2013*

**Geometry**

How many three digit numbers have three distinct digits?
*April 5, 2013*

**Math ms sue please help**

Is it right?
*April 4, 2013*

**Applied Calculus**

For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Find the radius and height of a container if it has a capacity of 29 in.3 and is constructed using the least amount of metal. (Round your answers to two decimal ...
*April 2, 2013*

**Calculus**

Let N = \int \int \int_B xyz^2\ dV , where B is the cuboid bounded by the regions 0 \leq x \leq 1, -1 \leq y \leq 2 and 0 \leq z \leq 3. If N = \frac{a}{b}, where a and b are coprime positive integers. What is the value of a+b?
*March 27, 2013*

**Applied Calc**

That's interesting you say that, listed under my professor's list of things we need to study, he has that listed. Do you believe it to be a mistake? Should I email him perhaps? I see what you are saying here. Thank you Bob.
*March 25, 2013*

**Applied Calc**

What is the marginal average cost function?
*March 25, 2013*

**Applied Calculus**

I know how to solve it to get .21, but I need to write it using positive exponents only. I know this isn't technically Calculus, but it is what we are reviewing currently. I am a bit rusty with this one, can't quite remember how to do it. I am trying some different ...
*March 21, 2013*

**Applied Calculus**

2^(3/4)*4^(-3/2)
*March 21, 2013*

**math**

Thx
*March 18, 2013*

**math**

2log[base3]9 = ?
*March 18, 2013*

**Applied Calculus**

A truck gets 800/x miles per gallon (mpg) when driven at a constant speed of x mph, where 40 ≤ x ≤ 80. If the price of fuel is $2.80/gal and the driver is paid $19/hr, at what speed is it most economical for the trucker to drive? (Round your answer to two decimal ...
*March 15, 2013*

**algebra**

a farmer has both cickens and cattle.These animals have a total of 40 heads and 140 feet.How many chicken and how many cattle has this farmer
*March 15, 2013*

**Science**

Two children, m1 = 50 kg and m2 = 55 kg, and a plastic sled of mass 35 kg start at rest and slide for 5.0 s down a hill. The force of gravity pulling the children and sled down the hill is 470 N but the snow provides a frictional force of 325 N. At the bottom of the hill, the ...
*March 13, 2013*

**Science**

Two children, m1 = 50 kg and m2 = 55 kg, and a plastic sled of mass 35 kg start at rest and slide for 5.0 s down a hill. The force of gravity pulling the children and sled down the hill is 470 N but the snow provides a frictional force of 325 N. At the bottom of the hill, the ...
*March 13, 2013*

**Applied Calculus**

I had to miss my last week of Calculus due to some personal things, so I had not been through any lectures of optimization. It hurt me greatly, now I have a few of these that I don't know how to set up at all.
*March 13, 2013*

**Applied Calculus**

A rectangular box is to have a square base and a volume of 50 ft3. The material for the base costs 32¢/ft2, the material for the sides costs 10¢/ft2, and the material for the top costs 26¢/ft2. Letting x denote the length of one side of the base, find a function...
*March 13, 2013*

**Applied Calculus**

If an open box has a square base and a volume of 112 in.3 and is constructed from a tin sheet, find the dimensions of the box, assuming a minimum amount of material is used in its construction. (Round your answers to two decimal places.) Height: Length: Width:
*March 12, 2013*

**Applied Calculus**

If an open box is made from a tin sheet 7 in. square by cutting out identical squares from each corner and bending up the resulting flaps, determine the dimensions of the largest box that can be made. (Round your answers to two decimal places.) Height: Length: Width:
*March 8, 2013*

**Applied Calculus**

Find the absolute maximum and absolute minimum values, if any, of the function. (If an answer does not exist, enter DNE.) h(x) = x3 + 3x2 + 4 on [−3, 2]
*March 6, 2013*

**Applied Calculus**

Find the relative extrema, if any, of the function. Use the Second Derivative Test if applicable. (If an answer does not exist, enter DNE.) g(x)=x^(3)-9x
*March 3, 2013*

**Applied Calculus**

Let f(x) = x3 − 4x2. Find the point(s) on the graph of f where the tangent line is horizontal.
*March 1, 2013*

**Applied Calculus**

Let f(x) = −x2 + ax + b. Determine the constants a and b such that f has a relative maximum at x = 2 and the relative maximum value is 13.
*February 27, 2013*

**Applied Calculus**

Find the third derivative of the function: g(t)=square root of 7t+5
*February 27, 2013*

**Applied Calculus**

Find the third derivative of the function: g(t)=square root of 7t+5
*February 27, 2013*

**math**

the riddle answer i got was "try sports tho>' it seems wrong ?
*February 26, 2013*

**math**

where did you get 160?
*February 26, 2013*

**math**

wait is it 3?
*February 26, 2013*

**math**

i dont get how to set it up. i know how to do the math.
*February 26, 2013*

**math**

i got 308?
*February 26, 2013*

**math**

in science class, there is enough chemical solution for 154 students to complete 12 labs. if 6 more students enroll, for how many labs will there be enough chemical?
*February 26, 2013*

**math**

a map in history class uses a scale of 1 inch=50 miles. a line measuring 3/4 inch long represents how many miles?
*February 26, 2013*

**math**

the geometry teacher has enough chalk to last for 16 proofs in each of three classes. if a fourth class is added, how many proofs per class can she now do?
*February 26, 2013*

**math**

there word problems
*February 26, 2013*