Sunday

May 1, 2016
Total # Posts: 895

**math**

In 1980 in Montana the temperature rose from -32 degree's f to 50 degree's f in 12 hours. How much did the temperature increase?
*August 30, 2012*

**chemistry**

The density of Hexane is 0.659 g/mL. What is the mass of hexane in 25.9 mL?
*August 26, 2012*

**Calculus**

THanks Steve, but why 3x+5??
*August 10, 2012*

**Calculus**

Evaluate the following definite integral: integral at a = -1, b=2 -4dx/(9x^2+30x+25) Would I have to separate them in 3 terms as: -4 ∫1/9x^2 + ∫1/30x + ∫1/25 resulting in: -4/(3x^3)+ (15x^2)+ C? and from there I can replace a and b f(a) - f(b)? Thank you
*August 10, 2012*

**Calculus**

This is another textbook number that doesn't have the solution and I can't figure it out. Any tips would be greatly appreciated. For each of the plane surfaces, calculate the exact surface area. (Answer in fractions) (a)The surface composed of all surfaces bounded by ...
*August 9, 2012*

**Calculus**

Thanks Reiny :)
*August 8, 2012*

**Calculus**

This is a question from my textbook that does't have a solution and quite frankly I have no idea what to do. Any tips would be greatly appreciated. Given the function f defined by f(x) = 9 - x^2. Find the surface area bounded by the curve y = f(x), the x axis and the lines...
*August 8, 2012*

**Calculus - Verification**

Hello, I just wanted to verify this definite integral and if my answer is good: a = 1 and b = 4 integral of (1 - 1/x^2)(x^2 + 1/x) dx = (x + 1/x)(x^3/3 + lnx) + C (4 + 1/4)(64/3 + ln4) - (1 + 1)(1/3 + ln1) = 96.56 - 0.6666 = 95.89 THank you
*August 7, 2012*

**Calculus**

awesome, thanks man!
*August 7, 2012*

**Calculus**

ok Damon, so if you integrate what you have me, you get 1/u no? Because 1/u^2 = -1/u, so -1/u^2 = 1/u?
*August 7, 2012*

**Calculus**

so I tried again and I got this, don't know if it's good:(I also put the wrong a and b) integral 0 = a and b = pi/3 of sinx dx/(1+cos)^2 u = cosx du= -sinxdx -1 du = sinx dx so: integral -1 du/(1+u)^2 = 1/(u+1) if x = 0, then u = 1 if x = pi/3, then u = 1 so 1/1+1 - 1/...
*August 7, 2012*

**Calculus**

Evaluate the following integral integral 1 = a and b = 4 of sinx dx/(1+cos)^2 u = cosx du = -sinx dx so from here I don't know if I can do: -1 du = sinx dx or 1/sin du = x dx
*August 7, 2012*

**Math**

The acceleration of an object g = -9.8 m/s^2. From the top of a building of 245 m., an object is thrown upwards at an initial velocity of 12m/s (a) What is the function for the velocity of the object? I put vf^2 = Vi^2 + 2a(yf-yi) vf^2 = 216.09 + 19.6 (yf - 245) (b) Determine ...
*August 6, 2012*

**Calculus**

thanks a lot mate
*August 6, 2012*

**Math**

find the area* sorry
*July 24, 2012*

**Math**

ind thearea bounded by y= -0.5x+6, y= 1/4 x and the y-axis.
*July 24, 2012*

**Science**

Describe each stage of the flow of information starting with DNA and ending with a trait? manifest - provide evidence for
*July 21, 2012*

**Algebra**

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.7 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
*July 20, 2012*

**Airplane trig question**

An airplane, flying at a speed of 420 miles per hour, flies from point A in the direction 131 degrees for 90 min. and then flies in the direction 41 degrees for 30 min. in what direction does the plane need to fly in order to get back to point A?
*July 10, 2012*

**Finance**

15.0%
*June 26, 2012*

**math**

Permute Sub(11)Psub(4) Sub(5)Csub(5)
*May 17, 2012*

**SQL**

1. How do you display letters in uppercase in access? how do you display in lowercase in access? 2. how do you round a number to a spisfic number of decimal places in access? how do you remove everything to the right of the decimal place in access? 3. how do you add months to ...
*May 9, 2012*

**physics**

i dont understand the concept. i make sense of things by simplifying it to a meaning i can comprehend. with this question i can not do that.
*May 3, 2012*

**physics**

Light from a 550 nm source goes through two slits 0.040 mm apart, a screen is 1.5 m from the slits. a)what is the angular separation of the of the two first order maxima occurring on the screen? b)what is the distance between the two first order maxima occuring on the screen? ...
*May 3, 2012*

**physics**

What is the force exerted on 40 micro coulombs by 20 micro coulombs? (charges are separated by 80cm)
*May 2, 2012*

**Statistics**

The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) $34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Perform an F test and determine if the price and the number of flash drives sold are related. Let (...
*April 29, 2012*

**math**

5/7-2/3=
*April 19, 2012*

**math**

how many more degrees in the angles of a trapezoid than in a square?
*April 12, 2012*

**geometry**

How many more degrees in the angles of a trapezoid that in a square?
*April 12, 2012*

**Computer Programming**

I need a check on my answers 1) prompt a user to enter an employee name, employee id, and hours worked until a value of "-1" is entered for employye name. my answer: Start Declarations num EmployId, HrsWrked string EmployName housework() detailLoop() Stop housework...
*April 3, 2012*

**Geometry**

the area of a regular octagon is 35 cm square. what is the area of a regular octagon with sides five times as long?
*April 2, 2012*

**algebra**

fill in the missing values for a retangular prism. length__________? width 7 height 5 surface area 358 volume __________? Formula SA = 2(LxW) + 2(LxH) + 2(WxH)
*March 28, 2012*

**math**

fill in the missing vvalues for a retangular prism. length__________? width 7 height 5 surface area 358 volume __________? sa = 2(lw) + 2(lh) + 2(wh)
*March 28, 2012*

**math**

Mr Thomas wants to carpet his bed room. The size of the bed room is 15 feet x 27 feet. The carpet sells for $8.95 per square yard,installed. How much will he have to spend to carpet the bed room?
*March 27, 2012*

**math**

If 1 meter=39.25 inches, how many inches are in a hectometer
*March 8, 2012*

**Solid Mensuration**

Two similar cones have volumes 81pi/2 in^3 and 12pi in^3 and slant height of the bigger cone is 7.5 in. Find the integer solution to the height of the similar cone.
*March 2, 2012*

**Solid Mensuration**

Two similar cones have volumes 81pi/2 in^3 and 12pi in^3 and slant height of the bigger cone is 7.5 in. Find the integer solution to the height of the similar cone.
*March 2, 2012*

**math**

d=9in
*February 21, 2012*

**Math 208**

d=9in
*February 21, 2012*

**4th grade math**

What would you add to 2/3 to get a sum of 1?
*February 12, 2012*

**4th grade math**

How could you find the measurements of the garden with a perimeter of 60 feet and the greatest possible area?
*February 12, 2012*

**trigonometry**

Hey thanks! I have the same problem. never thought it would be this easy.
*February 10, 2012*

**Physics**

A med tech student pushes a 30-kg carton of books across the floor of her dormitory by exerting a constant force of 185 N at an angle of 37 degrees with the horizontal. If the opposing force of friction is 70 N, how much work does he do as he moves the carton in 4m in 15s? ...
*February 6, 2012*

**winter springs high**

how do i solve 2x+7y=-20 and y=3x+7
*January 22, 2012*

**math**

what is the probability that that one of my two picks is selected in NY State's Take 5 - (5) numbers are selected from a set of 39 without replacement
*January 9, 2012*

**history**

what event set precedence that alleviated the problem of having no law of succession in the empire I have no book Please help
*January 8, 2012*

**history **

what is the most deadly phase of a volcanic eruption like the one at vesuvius (I do not have a book show me the link )
*January 8, 2012*

**history**

I dont have a book I need your help
*January 8, 2012*

**history **

what is the most deadly phase of a volcanic eruption like the one at vesuvius (show link to this)
*January 8, 2012*

**history **

who was the roman who made advancenements in medicine by dissecting animals
*January 8, 2012*

**history**

I don"t have a book show the link and i read it
*January 8, 2012*

**history **

why did the romans reuild carthage after they destroyed it in the punic war(show the link )I have a test please help me
*January 8, 2012*

**history **

what event set precedence that alleviated the the problem of having on law of succession in the empire please help
*January 8, 2012*

**History **

what were at least 2 problem of drawbacks associated with the way the romans had their office of consul arranged (show me link to this)
*January 8, 2012*

**history**

name 2 of the previous names of the modern day city of istanbul (show me link to help me)
*January 8, 2012*

**Algebra**

I am preparing for a quiz and received a small guide (mini guide) over the weekend. So I have all the answers to the questions but I want to learn how to solve this specific problem: 2^(5/2)- 2^(3/2) and the answer is 2^(3/2). To clarify the numbers in the parentheses are ...
*January 8, 2012*

**Alg 2**

An account with annual compound, apr of 2% and an initial deposit of 224, after 535 years
*December 13, 2011*

**Math**

There were 93 students going to a nature camp. After equal groups of fewer than10 students , were formed for hiking, 2 students were left over . How many equal groups were formed?
*December 4, 2011*

**math**

how do i write 3474.8 in scientific notation
*December 1, 2011*

**geometry**

The slope of any line perpendicular to , where A(0, -3) and B(4, 9) are two points on the line, is m =
*November 28, 2011*

**chemistry**

Choices: True,False. Select all that are True. The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because of the presentce of the conjugated acid in the water. One cannot prepare a buffer from a strong acid and its conjugated base, ...
*November 26, 2011*

**Help in Chemistry!!**

but what about water?
*November 26, 2011*

**Chemistry!!**

oh ok! i wasn't rounding, thank you.
*November 26, 2011*

**Chemistry!!**

i did that, but the answer is wrong.
*November 26, 2011*

**PHYSICS PLEASE HELP!!**

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.15×10−23 kg . m/s and 5.19×10−23 kg . m/s, respectively. 1.)What is the magnitude of the...
*November 20, 2011*

**physics**

A rocket is fired in deep space, where gravity is negligible. In the first second it ejects 1/160 of its mass as exhaust gas and has an acceleration of 15.1 m/s^2.What is the speed v_gas of the exhaust gas relative to the rocket?
*November 14, 2011*

**physics**

a 60 kg student jumps from a table 1.2m high. When his feet hit the floor he bends his knees so that the stopping time is .06s. What is the average force that the floor exerts on his body in order to stop him?
*November 9, 2011*

**Math**

Use the present value formula to compute the amount that should be set aside today to ensure a future value of $ 2,000 in 1 year if the interest rate is 12% annually, compounded annually. (a) $ 1,776.97 (b) $ 1,765.89 (c) $ 1,785.72 (d) $ 1,786.97 (e) $ 1,768.97
*November 3, 2011*

**Chemistry**

15 mL of 60oC water is mixed with 10 mL of 0oC water in a perfect calorimeter. What is the final temperature?
*November 2, 2011*

**sreet smarts**

when a person says whats up or dig it what do you say back
*October 31, 2011*

**business**

What are the disadvantages of using a contingent work force?
*October 29, 2011*

**physics**

if a bag weighing 9.4 kg is dropped 1m to someone below to catch,what is the total weight that the person would actually catch??
*October 28, 2011*

**physics**

Oh thats right sorry, if the 9.4kg bag drops 1m vertically, before someone cathces it, what weigth would they be catching??
*October 28, 2011*

**physics**

Oh thats right sorry, if the 9.4kg bag drops 1m, before someone cathces it, what would it weigh when they c
*October 28, 2011*

**physics**

a bag weighing 9.4kg is dropped 1m onto concrete, what is the impact force in kg
*October 28, 2011*

**Fluid Mechanics**

. A plate of mass M is suspended between two opposing jets, each of area A, velocity Vo and density . The plate is suddenly given a velocity Vo parallel to one of the jets. Determine the subsequent motion of the plate (x(t)), and the maximum displacement of the plate (...
*October 17, 2011*

**chemitry**

show that the equivalence amount of citric acid for 1.00g of sodium bicarbonate is 0.76g
*October 11, 2011*

**probability**

A dictionary contains 80,000 words, of which a certain student knows 30,000. If 100 of the 80,000 words are selected at random from the dictionary without replacement, find the probability:the student knows exactly 40 of the 100 words
*October 11, 2011*

**Physics**

yes, I added the vectors, of the charges. for a uniform line, E= kλ/R. Since the charge on the line is negative, it goes towards the line, and only has an x component of E= -12 kN/C. For the point charge, which is negative, E is away from the source, I got E=30.2 kN/C for...
*October 9, 2011*

**Physics**

An infinitely long line charge of uniform linear charge density λ = -3.00 µC/m lies parallel to the y axis at x = -2.00 m. A point charge of 4.70 µC is located at x = 1.50 m, y = 2.50 m. Find the electric field at x = 2.50 m, y = 2.00 m. I get 23.7 kN/C, why ...
*October 9, 2011*

**algebra**

true or false, Distributive property says that you can give out a factor to both numbers in a sum then add them together afterward
*October 6, 2011*

**Geometry**

Let x = acute angle 1 and 4x + 17 ext angle Let y = acute angle 2 and 6x + 23 ext angle x + 4x + 17 = 180 X=32.6 y =90-x = 90-32.6 = 57.4 4(32.6) + 17 = 147.4 Note: Cannot use x value for ext. 6x+23. Y is different acute angle. Vice versa.
*October 5, 2011*

**science**

a can potatoes has the following data: recall 4-9system carbs=22 fat is 10 grams and protien is 13 find the percentage of each if the calories = 275
*October 4, 2011*

**chemistry**

A student estimated the volume of liquid in a beaker as 200 mL. When she poured the liquid into a graduated cylinder, she measured the volume as 216 mL. What is the percent error of the estimated volume from the beaker, taking the measurement in the graduated cylinder as the ...
*October 2, 2011*

**History**

Is it a false statement to say that every single group of people who have wished to establish their independence and their own individuality from a corrupt form of government will eventually succeed at doing so? Like with segregration and everything and like i don't know ...
*September 27, 2011*

**math pre-algebra**

1.x/4+2=1 2.-3+x/1=-3 please show steps thanks
*September 22, 2011*

**math**

x/4+2=1 -3+x/1=-3 please show steps thanks
*September 22, 2011*

**math**

2-4n=10 please show how you get the answer thanks
*September 22, 2011*

**math**

-3+x/1=-3
*September 22, 2011*

**spanish**

Form complete sentences using the information provided. Use indirect object pronouns and the present tense of the verbs Javier / prestar / el abrigo / a Gabriel
*September 18, 2011*

**grammar**

circle the words that have the long a or e sound stream stem let man plains saw land late calm text breed endless play part flat
*September 8, 2011*

**geometry**

i dont know!!!
*August 24, 2011*

**phsics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +16.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.60 m/s2. How fast is the racer moving 2.90 102 m after the parachute opens?
*August 23, 2011*

**math**

in a class of 28 sixth graders , all but one of the students are 12 years old. which two data measurements are the same for the student's ages? What are those measurements?
*August 10, 2011*

**Spanish**

Yes I understand. I kept saying the two options out loud. What I was confused was, I thought choice a meant, "Good, you pay tomorrow." But I'm starting to understand the meaning behind attaching "te" behind pagar. I had trouble understanding this ...
*August 9, 2011*

**Spanish**

Yo te puedo pagar manana. (accent on n) Would the response be a. Bueno, pagate manana. (accent on a and n) b. No, pagame ahora mismo. (accent on a) And can you explain why? Gracias
*August 9, 2011*

**Spanish**

I always thought Ustedes meant "they." I've also heard it as "you all (plural)". So when a question being given has the Uds. conjugation of the infinitive, are we suppose to answer back in the Uds. form or nosotros form? For example: A que hora van a ...
*July 11, 2011*

**Environmental Science**

If global energy policies lead to stabilisation of CO2 concentrations at 660 p.p.m., what would the resulting increase in GMST be (to one decimal place)? In subsequent parts of the question this is referred to as the UN’s ‘de facto temperature target’
*July 11, 2011*

**science**

how many seconds you will reached the distance of 200 m. if your acceleration at 2m/s/s?
*July 6, 2011*