Thursday

September 3, 2015
Total # Posts: 717

**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*

**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*

**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*

**math**

if i asked on here then, i dont know hw to do it..so i need the riddle to see how to get the answers
*February 26, 2013*

**math**

what should you do if at first you dont succeed? its a riddle and the letters are y,t,o,r,h,p,s
*February 26, 2013*

**Applied Calculus**

If the line passing through the points (a, 1) and (−8, 7 is parallel to the line passing through the points (−11, 8) and (a + 2, 1), what is the value of a?
*February 25, 2013*

**Applied Calculus**

Find the x-value of the relative minima of the function: 2x^(2)+((256)/(x))+8
*February 25, 2013*

**Chemistry**

What is(are) the precipitate(s) that form when K2SO4, BaCl2, and AgNO3 solutions are mixed?
*February 23, 2013*

**Applied Calculus**

Use differentials to approximate the quantity (give answer to 4 decimal places) 4th root of 256.6.
*February 21, 2013*

**geometry**

did you hear about... it says its supposed to be a novel.. my words are robins, because,rooster,so,name,sun,best,the,was,banks,gave,wrecked,robinson,farmer,crew,he,who,pet,the,his. it's 13 boxes long.
*February 20, 2013*

**geometry**

Did you hear about...(it says it would be a novel name)
*February 20, 2013*

**Applied Calculus**

Find the third derivative of the function: (5t+4)^(1/2)
*February 20, 2013*

**Applied Calculus**

Find the first and second derivative of the function: x/(7x+10) Using quotient rule. This is part of my homework in the section named "Higher Order Derivatives". I am confused on getting the second derivative, as I found the first derivative to be 10/(7x+10)^2
*February 20, 2013*

**Applied Calculus**

Yeah, I was forgetful and forgot it was the Quotient Rule. Thank you all, I got it!
*February 18, 2013*

**Applied Calculus**

Find the derivative of the function: (x^(3)-8)/(x^(2)+9)
*February 18, 2013*

**Applied Calculus**

Find the derivative of this function: g(t)=(8t+10)^2*(10t^2-7)^-3 Using the Chain Rule.
*February 15, 2013*

**Applied Calculus**

Find the derivative of the function. g(t) = ((8t + 10)^2)*(((10t^2) - 7)^-3) I am supposed to use The Chain Rule. However, I am confused as to how to do this.
*February 14, 2013*

**Excel**

What are the symbols I would use in Excel for each of the following Comparison Operators? "At Least" --> "More Than" --> "X Or Higher" --> "X Or Less" --> "Not More Than" --> "At Most" -->
*February 13, 2013*

**Applied Calculus**

Yeah, what I accidently did was I tried to solve it further, but I completely over thought that. Thank you Bob!
*February 11, 2013*

**Applied Calculus**

Find the derivative of the function: f(x)=(x^2+9)/square roote of x
*February 11, 2013*

**Applied Calculus**

Find the derivative of the function f by using the rules of differentiation. f(x)=340
*February 11, 2013*

**Science!**

How many grams of NH3 gas can be made if 42.0 g of N2 gas and 12.0 g of H2 gas react with each other? N2 + 3 H2 ↔ 2 NH3
*February 11, 2013*

**math**

Jerome is 1.5 meters tall, and at a certain time of day, he casts a shadow that is 2 meters. His friend measures the shadow formed by a nearby flagpole at the same time of day and finds it to be 24 meters. What is the height of the flagpole?
*February 8, 2013*

**Applied Calculus......**

Rewrite the expression using positive exponents only. (Simplify your answer completely.) (x^3-y^3)(x^-3+y^-3)
*February 8, 2013*

**Applied Calculus......**

Under a set of controlled laboratory conditions, the size of the population of a certain bacteria culture at time t (in minutes) is described by the following function. P=f(t)=3t^2+2t+1 Find the rate of population growth at t = 9 min.
*February 7, 2013*

**Applied Calculus......**

Find the slope m of the tangent line to the graph of the function at the given point and determine an equation of the tangent line. f(x)=6x-5x^2 at (-2, -32) I have to use the four step process, but seem to be getting stuck...
*February 7, 2013*

**Math**

A copy machine makes 60 copies per minute. A second copy machine makes 80 copies per minute. The second machine starts making copies 2 minutes after the first machine starts. Both machines stop making copies 8 minutes after the first machine started. Together, the 2 machines ...
*February 6, 2013*

**Accounting**

The business was started on April 1st. I have the following events that happened: what accounts should I debit and credit? 1. Incurred advertising expense of $1,907 on account. 2. Hired park manager at a salary of $3,783 per month, effective May 1. 3. Sold 140 coupon books for...
*February 6, 2013*

**Accounting**

The business was started on April 1st. I have the following events that happened: what accounts should I debit and credit? 1. Incurred advertising expense of $1,907 on account. 2. Hired park manager at a salary of $3,783 per month, effective May 1. 3. Sold 140 coupon books for...
*February 5, 2013*

**Physics**

The drawing shows six point charges arranged in a rectangle. The value of q is 8.07 μC, and the distance d is 0.430 m. Find the total electric potential at location P, which is at the center of the rectangle.
*February 5, 2013*

**Physics**

The drawing shows six point charges arranged in a rectangle. The value of q is 8.07 μC, and the distance d is 0.430 m. Find the total electric potential at location P, which is at the center of the rectangle.
*February 5, 2013*

**Physics**

The drawing shows six point charges arranged in a rectangle. The value of q is 8.07 μC, and the distance d is 0.430 m. Find the total electric potential at location P, which is at the center of the rectangle.
*February 5, 2013*

**Applied Calculus......**

Use the method of bisection to find the root of the equation x^5 + 3x − 7 = 0 accurate to two decimal places.
*February 4, 2013*

**Applied Calculus......**

Suppose a snowy-tree cricket chirps 180 times per minute if the temperature is 102 degrees, and chirps 120 times per minute when the temperature is 90 degrees. Construct a mathematical model that will predict the number of chirps per minute at a temperature in degrees ...
*February 3, 2013*

**english**

i need to write a historical narrative for school. it has to have dialogue and be in any persons viewpoint from the great depression and world war 2. it has to revolve around a specific climax or such. so i need some help coming up what to write about! thanks much.
*February 3, 2013*

**Applied Calculus......**

A book designer decided that the pages of a book should have 1-in. margins at the top and bottom and 1/2 in. margins on the sides. She further stipulated that each page should have an area of 60 in.2. Find a function in the variable x, giving the area of the printed region.
*January 29, 2013*

**Percent word problem**

A pitcher holds 2 gallons of orange juice. The orange juice is made 20% concentrated juice and 80% water. How much water is used in the orange juice?
*January 18, 2013*

**Physics**

The patient in the figure below is to receive an intravenous injection of medication. In order to work properly, the pressure of fluid containing the medication must be 108 kPa at the injection point. (a) If the fluid has a density of 1024 kg/m3, find the height at which the ...
*January 15, 2013*